Quadriceps muscle. Medical search

The quadriceps femoris. A collective name of the four-headed skeletal muscle of the thigh, comprised of the rectus femoris, vastus intermedius, vastus lateralis, and vastus medialis.

The portion of the leg in humans and other animals found between the HIP and KNEE.

A subtype of striated muscle, attached by TENDONS to the SKELETON. Skeletal muscles are innervated and their movement can be consciously controlled. They are also called voluntary muscles.

Contractile tissue that produces movement in animals.

The amount of force generated by MUSCLE CONTRACTION. Muscle strength can be measured during isometric, isotonic, or isokinetic contraction, either manually or using a device such as a MUSCLE STRENGTH DYNAMOMETER.

A state arrived at through prolonged and strong contraction of a muscle. Studies in athletes during prolonged submaximal exercise have shown that muscle fatigue increases in almost direct proportion to the rate of muscle glycogen depletion. Muscle fatigue in short-term maximal exercise is associated with oxygen lack and an increased level of blood and muscle lactic acid, and an accompanying increase in hydrogen-ion concentration in the exercised muscle.

A vague complaint of debility, fatigue, or exhaustion attributable to weakness of various muscles. The weakness can be characterized as subacute or chronic, often progressive, and is a manifestation of many muscle and neuromuscular diseases. (From Wyngaarden et al., Cecil Textbook of Medicine, 19th ed, p2251)

A process leading to shortening and/or development of tension in muscle tissue. Muscle contraction occurs by a sliding filament mechanism whereby actin filaments slide inward among the myosin filaments.

The rotational force about an axis that is equal to the product of a force times the distance from the axis where the force is applied.

Muscular contractions characterized by increase in tension without change in length.

A region of the lower extremity immediately surrounding and including the KNEE JOINT.

A synovial hinge connection formed between the bones of the FEMUR; TIBIA; and PATELLA.

A nerve originating in the lumbar spinal cord (usually L2 to L4) and traveling through the lumbar plexus to provide motor innervation to extensors of the thigh and sensory innervation to parts of the thigh, lower leg, and foot, and to the hip and knee joints.

The protein constituents of muscle, the major ones being ACTINS and MYOSINS. More than a dozen accessory proteins exist including TROPONIN; TROPOMYOSIN; and DYSTROPHIN.

A device that measures MUSCLE STRENGTH during muscle contraction, such as gripping, pushing, and pulling. It is used to evaluate the health status of muscle in sports medicine or physical therapy.

Large, multinucleate single cells, either cylindrical or prismatic in shape, that form the basic unit of SKELETAL MUSCLE. They consist of MYOFIBRILS enclosed within and attached to the SARCOLEMMA. They are derived from the fusion of skeletal myoblasts (MYOBLASTS, SKELETAL) into a syncytium, followed by differentiation.

Recording of the changes in electric potential of muscle by means of surface or needle electrodes.

Application of electric current in treatment without the generation of perceptible heat. It includes electric stimulation of nerves or muscles, passage of current into the body, or use of interrupted current of low intensity to raise the threshold of the skin to pain.

The flat, triangular bone situated at the anterior part of the KNEE.

Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.

Unstriated and unstriped muscle, one of the muscles of the internal organs, blood vessels, hair follicles, etc. Contractile elements are elongated, usually spindle-shaped cells with centrally located nuclei. Smooth muscle fibers are bound together into sheets or bundles by reticular fibers and frequently elastic nets are also abundant. (From Stedman, 25th ed)

The inferior part of the lower extremity between the KNEE and the ANKLE.

Derangement in size and number of muscle fibers occurring with aging, reduction in blood supply, or following immobilization, prolonged weightlessness, malnutrition, and particularly in denervation.

A strong ligament of the knee that originates from the posteromedial portion of the lateral condyle of the femur, passes anteriorly and inferiorly between the condyles, and attaches to the depression in front of the intercondylar eminence of the tibia.

The properties, processes, and behavior of biological systems under the action of mechanical forces.

Injuries to the knee or the knee joint.

Acquired, familial, and congenital disorders of SKELETAL MUSCLE and SMOOTH MUSCLE.

A band of fibrous tissue that attaches the apex of the PATELLA to the lower part of the tubercle of the TIBIA. The ligament is actually the caudal continuation of the common tendon of the QUADRICEPS FEMORIS. The patella is embedded in that tendon. As such, the patellar ligament can be thought of as connecting the quadriceps femoris tendon to the tibia, and therefore it is sometimes called the patellar tendon.

The nonstriated involuntary muscle tissue of blood vessels.

These include the muscles of the DIAPHRAGM and the INTERCOSTAL MUSCLES.

Skeletal muscle fibers characterized by their expression of the Type I MYOSIN HEAVY CHAIN isoforms which have low ATPase activity and effect several other functional properties - shortening velocity, power output, rate of tension redevelopment.

Running at a low rate of speed. It can be done as a means of conditioning or for general health and well being.

Developmental events leading to the formation of adult muscular system, which includes differentiation of the various types of muscle cell precursors, migration of myoblasts, activation of myogenesis and development of muscle anchorage.

Devices intended to replace non-functioning organs. They may be temporary or permanent. Since they are intended always to function as the natural organs they are replacing, they should be differentiated from PROSTHESES AND IMPLANTS and specific types of prostheses which, though also replacements for body parts, are frequently cosmetic (EYE, ARTIFICIAL) as well as functional (ARTIFICIAL LIMBS).

Mitochondria of skeletal and smooth muscle. It does not include myocardial mitochondria for which MITOCHONDRIA, HEART is available.

Fibrous bands or cords of CONNECTIVE TISSUE at the ends of SKELETAL MUSCLE FIBERS that serve to attach the MUSCLES to bones and other structures.

The restriction of the MOVEMENT of whole or part of the body by physical means (RESTRAINT, PHYSICAL) or chemically by ANALGESIA, or the use of TRANQUILIZING AGENTS or NEUROMUSCULAR NONDEPOLARIZING AGENTS. It includes experimental protocols used to evaluate the physiologic effects of immobility.

The time span between the beginning of physical activity by an individual and the termination because of exhaustion.

Use of electric potential or currents to elicit biological responses.

Noninflammatory degenerative disease of the knee joint consisting of three large categories: conditions that block normal synchronous movement, conditions that produce abnormal pathways of motion, and conditions that cause stress concentration resulting in changes to articular cartilage. (Crenshaw, Campbell's Operative Orthopaedics, 8th ed, p2019)

The articulation between the articular surface of the PATELLA and the patellar surface of the FEMUR.

The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346)

The distance and direction to which a bone joint can be extended. Range of motion is a function of the condition of the joints, muscles, and connective tissues involved. Joint flexibility can be improved through appropriate MUSCLE STRETCHING EXERCISES.

A growth differentiation factor that is a potent inhibitor of SKELETAL MUSCLE growth. It may play a role in the regulation of MYOGENESIS and in muscle maintenance during adulthood.

A sport in which weights are lifted competitively or as an exercise.

Lack of stability of a joint or joint prosthesis. Factors involved are intra-articular disease and integrity of extra-articular structures such as joint capsule, ligaments, and muscles.

The use of a bicycle for transportation or recreation. It does not include the use of a bicycle in studying the body's response to physical exertion (BICYCLE ERGOMETRY TEST see EXERCISE TEST).

Skeletal muscle fibers characterized by their expression of the Type II MYOSIN HEAVY CHAIN isoforms which have high ATPase activity and effect several other functional properties - shortening velocity, power output, rate of tension redevelopment. Several fast types have been identified.

Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.

The physical state of supporting an applied load. This often refers to the weight-bearing bones or joints that support the body's weight, especially those in the spine, hip, knee, and foot.

Controlled physical activity which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used.

Manner or style of walking.

A syndrome characterized by retropatellar or peripatellar PAIN resulting from physical and biochemical changes in the patellofemoral joint. The pain is most prominent when ascending or descending stairs, squatting, or sitting with flexed knees. There is a lack of consensus on the etiology and treatment. The syndrome is often confused with (or accompanied by) CHONDROMALACIA PATELLAE, the latter describing a pathological condition of the CARTILAGE and not a syndrome.

Replacement of the knee joint.

The resection or removal of the innervation of a muscle or muscle tissue.

A regimen or plan of physical activities designed and prescribed for specific therapeutic goals. Its purpose is to restore normal musculoskeletal function or to reduce pain caused by diseases or injuries.

A partial or complete return to the normal or proper physiologic activity of an organ or part following disease or trauma.

A disease of chronic diffuse irreversible airflow obstruction. Subcategories of COPD include CHRONIC BRONCHITIS and PULMONARY EMPHYSEMA.

Elements of limited time intervals, contributing to particular results or situations.

Neurons which activate MUSCLE CELLS.

Muscles forming the ABDOMINAL WALL including RECTUS ABDOMINIS, external and internal oblique muscles, transversus abdominis, and quadratus abdominis. (from Stedman, 25th ed)

Non-striated, elongated, spindle-shaped cells found lining the digestive tract, uterus, and blood vessels. They are derived from specialized myoblasts (MYOBLASTS, SMOOTH MUSCLE).

Skeletal muscle structures that function as the MECHANORECEPTORS responsible for the stretch or myotactic reflex (REFLEX, STRETCH). They are composed of a bundle of encapsulated SKELETAL MUSCLE FIBERS, i.e., the intrafusal fibers (nuclear bag 1 fibers, nuclear bag 2 fibers, and nuclear chain fibers) innervated by SENSORY NEURONS.

A normal intermediate in the fermentation (oxidation, metabolism) of sugar. The concentrated form is used internally to prevent gastrointestinal fermentation. (From Stedman, 26th ed)

The non-genetic biological changes of an organism in response to challenges in its ENVIRONMENT.

Severe or complete loss of motor function in the lower extremities and lower portions of the trunk. This condition is most often associated with SPINAL CORD DISEASES, although BRAIN DISEASES; PERIPHERAL NERVOUS SYSTEM DISEASES; NEUROMUSCULAR DISEASES; and MUSCULAR DISEASES may also cause bilateral leg weakness.

Removal and pathologic examination of specimens in the form of small pieces of tissue from the living body.

That phase of a muscle twitch during which a muscle returns to a resting position.

General increase in bulk of a part or organ due to CELL ENLARGEMENT and accumulation of FLUIDS AND SECRETIONS, not due to tumor formation, nor to an increase in the number of cells (HYPERPLASIA).

The neck muscles consist of the platysma, splenius cervicis, sternocleidomastoid(eus), longus colli, the anterior, medius, and posterior scalenes, digastric(us), stylohyoid(eus), mylohyoid(eus), geniohyoid(eus), sternohyoid(eus), omohyoid(eus), sternothyroid(eus), and thyrohyoid(eus).

The muscles that move the eye. Included in this group are the medial rectus, lateral rectus, superior rectus, inferior rectus, inferior oblique, superior oblique, musculus orbitalis, and levator palpebrae superioris.

The flow of BLOOD through or around an organ or region of the body.

One of two types of muscle in the body, characterized by the array of bands observed under microscope. Striated muscles can be divided into two subtypes: the CARDIAC MUSCLE and the SKELETAL MUSCLE.

A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.

The measurement of an organ in volume, mass, or heaviness.

The longest and largest bone of the skeleton, it is situated between the hip and the knee.

Conical muscular projections from the walls of the cardiac ventricles, attached to the cusps of the atrioventricular valves by the chordae tendineae.

Scales, questionnaires, tests, and other methods used to assess pain severity and duration in patients or experimental animals to aid in diagnosis, therapy, and physiological studies.

The physical activity of a human or an animal as a behavioral phenomenon.

An unpleasant sensation induced by noxious stimuli which are detected by NERVE ENDINGS of NOCICEPTIVE NEURONS.

The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.

Mature contractile cells, commonly known as myocytes, that form one of three kinds of muscle. The three types of muscle cells are skeletal (MUSCLE FIBERS, SKELETAL), cardiac (MYOCYTES, CARDIAC), and smooth (MYOCYTES, SMOOTH MUSCLE). They are derived from embryonic (precursor) muscle cells called MYOBLASTS.

A masticatory muscle whose action is closing the jaws.

Muscles of facial expression or mimetic muscles that include the numerous muscles supplied by the facial nerve that are attached to and move the skin of the face. (From Stedman, 25th ed)

Muscles arising in the zygomatic arch that close the jaw. Their nerve supply is masseteric from the mandibular division of the trigeminal nerve. (From Stedman, 25th ed)

Diet modification and physical exercise to improve the ability to carry out daily tasks and perform physical activities.

Respiratory muscles that arise from the lower border of one rib and insert into the upper border of the adjoining rib, and contract during inspiration or respiration. (From Stedman, 25th ed)

Either of two extremities of four-footed non-primate land animals. It usually consists of a FEMUR; TIBIA; and FIBULA; tarsals; METATARSALS; and TOES. (From Storer et al., General Zoology, 6th ed, p73)

An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.

Processes and properties of the MUSCULOSKELETAL SYSTEM.

The musculofibrous partition that separates the THORACIC CAVITY from the ABDOMINAL CAVITY. Contraction of the diaphragm increases the volume of the thoracic cavity aiding INHALATION.

A monosynaptic reflex elicited by stimulating a nerve, particularly the tibial nerve, with an electric shock.

Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.

Forcible or traumatic tear or break of an organ or other soft part of the body.

Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.

Elongated, spindle-shaped, quiescent myoblasts lying in close contact with adult skeletal muscle. They are thought to play a role in muscle repair and regeneration.

The long cylindrical contractile organelles of STRIATED MUSCLE cells composed of ACTIN FILAMENTS; MYOSIN filaments; and other proteins organized in arrays of repeating units called SARCOMERES .

Salts or esters of LACTIC ACID containing the general formula CH3CHOHCOOR.

The larger subunits of MYOSINS. The heavy chains have a molecular weight of about 230 kDa and each heavy chain is usually associated with a dissimilar pair of MYOSIN LIGHT CHAINS. The heavy chains possess actin-binding and ATPase activity.

Studies which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.

The pectoralis major and pectoralis minor muscles that make up the upper and fore part of the chest in front of the AXILLA.

Injuries to the fibrous cords of connective tissue which attach muscles to bones or other structures.

The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior.

Effect of regular Tai Chi and jogging exercise on neuromuscular reaction in older people. (1/588)

OBJECTIVES: to investigate the effects of regular Tai Chi (TC) or jogging exercise on neuromuscular reaction in older people. DESIGN: cross-sectional study. SETTING: university biomechanics laboratory. SUBJECTS: 21 long-term elderly TC practitioners were compared with 18 regular elderly joggers and 22 sedentary counterparts. MEASUREMENTS: electromyography (EMG) was used to detect the neuromuscular reaction of the leg muscles to an unexpected ankle inversion perturbation. The latency of the muscles, which was defined as the time that the moment of perturbation began to the onset of the EMG response, was evaluated. RESULTS: a one-way ANOVA revealed that there were significant differences in the latency of the rectus femoris (R) and anterior tibialis (T) muscles between the three groups, but that there were no differences in the latency of the semitendinosus (S) and gastrocnemius (G) muscles. Further tests indicated that the R and T muscles in the TC and jogging groups were activated significantly faster than those in the control group. No significant difference was found for the muscle onset latencies between the TC and jogging groups. CONCLUSION: maintaining information processing speed during ageing is important, because of the role that it plays in many everyday events. The R and T muscles in the regular TC and jogging groups showed faster responses to unexpected ankle inversion perturbations, which is helpful for the timely correction of postural disturbances, than those in the sedentary control group. (+info)

Skeletal muscle mitochondrial DNA content in exercising humans. (2/588)

Several weeks of intense endurance training enhances mitochondrial biogenesis in humans. Whether a single bout of exercise alters skeletal muscle mitochondrial DNA (mtDNA) content remains unexplored. Double-stranded mtDNA, estimated by slot-blot hybridization and real time PCR and expressed as mtDNA-to-nuclear DNA ratio (mtDNA/nDNA) was obtained from the vastus lateralis muscle of healthy human subjects to investigate whether skeletal muscle mtDNA changes during fatiguing and nonfatiguing prolonged moderate intensity [2.0-2.5 h; approximately 60% maximal oxygen consumption (Vo(2 max))] and short repeated high-intensity exercise (5-8 min; approximately 110% Vo(2 max)). In control resting and light exercise (2 h; approximately 25% Vo(2 max)) studies, mtDNA/nDNA did not change. Conversely, mtDNA/nDNA declined after prolonged fatiguing exercise (0.863 +/- 0.061 vs. 1.101 +/- 0.067 at baseline; n = 14; P = 0.005), remained lower after 24 h of recovery, and was restored after 1 wk. After nonfatiguing prolonged exercise, mtDNA/nDNA tended to decline (n = 10; P = 0.083) but was reduced after three repeated high-intensity exercise bouts (0.900 +/- 0.049 vs. 1.067 +/- 0.071 at baseline; n = 7; P = 0.013). Our findings indicate that prolonged and short repeated intense exercise can lead to significant reductions in human skeletal muscle mtDNA content, which might function as a signal stimulating mitochondrial biogenesis with exercise training. (+info)

Effect of carbohydrate ingestion on exercise-induced alterations in metabolic gene expression. (3/588)

Skeletal muscle possesses a high degree of plasticity and can adapt to both the physical and metabolic challenges that it faces. An acute bout of exercise is sufficient to induce the expression of a variety of metabolic genes, such as GLUT4, pyruvate dehydrogenase kinase 4 (PDK-4), uncoupling protein-3 (UCP3), and peroxisome proliferator-activated receptor-gamma coactivator 1 (PGC-1). Reducing muscle glycogen levels before exercise potentiates the effect of exercise on many genes. Similarly, altered substrate availability induces transcription of many of these genes. The purpose of this study was to determine whether glucose ingestion attenuates the exercise-induced increase in a variety of exercise-responsive genes. Six male subjects (28 +/- 7 yr; 83 +/- 3 kg; peak pulmonary oxygen uptake = 46 +/- 6 ml.kg(-1).min(-1)) performed 60 min of cycling at 74 +/- 2% of peak pulmonary oxygen uptake on two separate occasions. On one occasion, subjects ingested a 6% carbohydrate drink. On the other occasion, subjects ingested an equal volume of a sweet placebo. Muscle samples were obtained from vastus lateralis at rest, immediately after exercise, and 3 h after exercise. PDK-4, UCP3, PGC-1, and GLUT4 mRNA levels were measured on these samples using real-time RT-PCR. Glucose ingestion attenuated (P < 0.05) the exercise-induced increase in PDK-4 and UCP3 mRNA. A similar trend (P = 0.09) was observed for GLUT4 mRNA. In contrast, PGC-1 mRNA increased following exercise to the same extent in both conditions. These data suggest that glucose availability can modulate the effect of exercise on metabolic gene expression. (+info)

Changes in dysferlin, proteins from dystrophin glycoprotein complex, costameres, and cytoskeleton in human soleus and vastus lateralis muscles after a long-term bedrest with or without exercise. (4/588)

This study was designed to evaluate the effects of hypokinesia and hypodynamia on cytoskeletal and related protein contents in human skeletal muscles. Twelve proteins: dystrophin and its associated proteins (DGC), dysferlin, talin, vinculin and meta-vinculin, alpha-actinin, desmin, actin, and myosin, were quantitatively analyzed during an 84-day long-term bedrest (LTBR). The preventive or compensatory effects of maximal resistance exercise (MRE) as a countermeasure were evaluated. Most of these proteins are involved in several myopathies, and they play an important role in muscle structure, fiber cohesion, cell integrity maintenance, and force transmission. This is the first comparison of the cytoskeletal protein contents between slow postural soleus (SOL) and mixed poly-functional vastus lateralis (VL) human muscles. Protein contents were higher in VL than in SOL (from 12 to 94%). These differences could be mainly explained by the differential mechanical constraints imposed on the muscles, i.e., cytoskeletal protein contents increase with mechanical constraints. After LTBR, proteins belonging to the DGC, dysferlin, and proteins of the costamere exhibited large increases, higher in SOL (from 67 to 216%) than in VL (from 32 to 142%). Plasma membrane remodeling during muscle atrophy is probably one of the key points for interpreting these modifications, and mechanisms other than those involved in the resistance of the cytoskeleton to mechanical constraints may be implicated (membrane repair). MRE compensates the cytoskeletal changes induced by LTBR in SOL, except for gamma-sarcoglycan (+70%) and dysferlin (+108%). The exercise only partly compensated the DGC changes induced in VL, and, as for SOL, dysferlin remained largely increased (+132%). Moreover, vinculin and metavinculin, which exhibited no significant change in VL after LTBR, were increased with MRE during LTBR, reinforcing the pre-LTBR differences between SOL and VL. This knowledge will contribute to the development of efficient space flight countermeasures and rehabilitation methods in clinical situations where musculoskeletal unloading is a component. (+info)

Quadriceps force generation in patients with osteoarthritis of the knee and asymptomatic participants during patellar tendon reflex reactions: an exploratory cross-sectional study. (5/588)

BACKGROUND: It has been postulated that muscle contraction is slower in patients with osteoarthritis of the knee than asymptomatic individuals, a factor that could theoretically impair joint protection mechanisms. This study investigated whether patients with osteoarthritis of the knee took longer than asymptomatic participants to generate force during reflex quadriceps muscle contraction. This was an exploratory study to inform sample size for future studies. METHODS: An exploratory observational cross sectional study was carried out. Two subject groups were tested, asymptomatic participants (n = 17), mean (SD) 56.7 (8.6) years, and patients with osteoarthritis of the knee, diagnosed by an orthopaedic surgeon, (n = 16), age 65.9 (7.8) years. Patellar tendon reflex responses were elicited from participants and measured with a load cell. Force latency, contraction time, and force of the reflex response were determined from digitally stored data. The Mann-Whitney U test was used for the between group comparisons in these variables. Bland and Altman within-subject standard deviation values were calculated to evaluate the measurement error or precision of force latency and contraction time. RESULTS: No significant differences were found between the groups for force latency (p = 0.47), contraction time (p = 0.91), or force (p = 0.72). The two standard deviation measurement error values for force latency were 27.9 ms for asymptomatic participants and 16.4 ms for OA knee patients. For contraction time, these values were 29.3 ms for asymptomatic participants and 28.1 ms for OA knee patients. Post hoc calculations revealed that the study was adequately powered (80%) to detect a difference between the groups of 30 ms in force latency. However it was inadequately powered (59%) to detect this same difference in contraction time, and 28 participants would be required in each group to reach 80% power. CONCLUSION: Patients with osteoarthritis of the knee do not appear to have compromised temporal parameters or magnitude of force generation during patellar tendon reflex reactions when compared to a group of asymptomatic participants. However, these results suggest that larger studies are carried out to investigate this area further. (+info)

The relationship between ciliary neurotrophic factor (CNTF) genotype and motor unit physiology: preliminary studies. (6/588)

BACKGROUND: Ciliary neurotrophic factor (CNTF) is important for neuronal and muscle development, and genetic variation in the CNTF gene has been associated with muscle strength. The effect of CNTF on nerve development suggests that CNTF genotype may be associated with force production via its influence on motor unit size and firing patterns. The purpose of this study is to examine whether CNTF genotype differentially affects motor unit activation in the vastus medialis with increasing isometric force during knee extension. RESULTS: Sixty-nine healthy subjects were genotyped for the presence of the G and A (null) alleles in the CNTF gene (n = 57 G/G, 12 G/A). They were tested using a dynamometer during submaximal isometric knee extension contractions that were from 10-50% of their maximal strength. During the contractions, the vastus medialis was studied using surface and intramuscular electromyography with spiked triggered averaging to assess surface-detected motor unit potential (SMUP) area and mean firing rates (mFR) from identified motor units. CNTF genotyping was performed using standard PCR techniques from DNA obtained from leucocytes of whole blood samples. The CNTF G/A genotype was associated with smaller SMUP area motor units and lower mFR at higher force levels, and fewer but larger units at lower force levels than G/G homozygotes. The two groups used motor units with different size and activation characteristics with increasing force generation. While G/G subjects tended to utilize larger motor units with increasing force, G/A subjects showed relatively less increase in size by using relatively larger units at lower force levels. At higher force levels, G/A subjects were able to generate more force per motor unit size suggesting more efficient motor unit function with increasing muscle force. CONCLUSION: Differential motor unit responses were observed between CNTF genotypes at force levels utilized in daily activities. (+info)

Therapeutic exercise for knee osteoarthritis: considering factors that may influence outcome. (7/588)

While exercise has been shown to be beneficial for reducing pain and improving physical function in individuals with knee osteoarthritis (OA), there are still individuals who do not always respond well to this treatment approach. There are a number of factors that have been shown to influence either the degree of disability and/or the progression of disease in individuals with knee OA. These factors include quadriceps inhibition or activation failure, obesity, passive knee laxity, knee alignment, fear of physical activity and self efficacy. It may be possible that varying levels of these factors might also interfere with an individual's ability to participate in an exercise or physical activity program or minimize the benefits that can be achieved by such programs. This paper examines the influence of these factors on physical function and their potential for altering the outcome of exercise therapy programs for individuals with knee OA. Implications and suggestions for potential adjunctive interventions to address these factors in future research and clinical practice are also discussed. (+info)

Maximal motor unit firing rates during isometric resistance training in men. (8/588)

This study measured changes in maximal voluntary contraction (MVC) force, percentage maximal activation, maximal surface EMG, M-wave amplitude and average motor unit firing rates during the initial 3 weeks of isometric resistance training of the quadriceps muscle. Ten men participated in a resistance training programme three times a week for 3 weeks and 10 men participated as a control group. In the training group, MVC increased by 35% (from 761 +/- 77 to 1031 +/- 78 N) by the end of the 3 weeks. There were no changes in mean motor unit firing rates during submaximal or maximal voluntary contractions of 50 (15.51 +/- 1.48 Hz), 75 (20.23 +/- 1.85 Hz) or 100% MVC (42.25 +/- 2.72 Hz) with isometric resistance training. There was also no change in maximal surface EMG relative to the M-wave amplitude. However, there was a small increase in maximal activation (from 95.7 +/- 1.83 to 98.44 +/- 0.66%) as measured by the twitch interpolation technique. There were no changes in any of the parameters measured in the control group. It is suggested that mechanisms other than increases in average motor unit firing rates contributed to the increase in maximal force output with resistance training. Such mechanisms may include a combination of increased motor unit recruitment, enhanced protein synthesis, and changes in motor unit synchronization and muscle activation patterns across the quadriceps synergy. (+info)

Fibrosis Mukherjee PK, Das AK (1980). "Injection fibrosis in the quadriceps femoris muscle in children". J Bone Joint Surg Am. ... Injections are often delivered to the quadriceps, triceps, and gluteal muscles, and thus the complication often manifests ... Patients are unable to fully flex the affected muscle. The condition is painless, but progressively worsens over time. ...

https://en.wikipedia.org/wiki/Injection_fibrosis

Those muscles include the hamstrings, quadriceps, and calf muscles. One popular exercise used to strengthen the hamstrings is ... Seated leg extensions strengthen the quadriceps and doing the quadriceps stretch will help loosen the muscles. Toe raises are ... Exercises can strengthen the muscles around the knee, especially the quadriceps. Stronger and bigger muscles will protect the ... Adequate muscle mass and strength may also aid in maintaining healthy knees. The use of the parallel squat increases much ...

https://en.wikipedia.org/wiki/Meniscus_tear

Quadriceps femoris muscle Anterior compartment of thigh Grob, K.; Ackland, T.; Kuster, M.S.; Manestar, M.; Filgueira, L. (March ... The muscle lies anterior to the vastus intermedius but deep to the rectus femoris. The tendinous part of the muscle is closely ... Golland, Jennifer; Mahon, M.; Willan, P. L. T. "Anatomical variations in human quadriceps femoris muscles": 263-264. {{cite ... Two separate muscle bellies can be found for the two-belly types.[citation needed] The tensor vastus intermedius muscle tenses ...

https://en.wikipedia.org/wiki/Tensor_vastus_intermedius_muscle

These quadriceps muscles are innervated by the femoral nerve. The tibial tuberosity thus forms the terminal part of the large ... The quadriceps muscles consist of the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. ... which attaches to the patella from where the suprapatellar ligament forms the distal tendon of the quadriceps femoris muscles. ...

https://en.wikipedia.org/wiki/Tuberosity_of_the_tibia

The quadriceps femoris muscle (/ˈkwɒdrɪsɛps ˈfɛmərɪs/, also called the quadriceps extensor, quadriceps or quads) is a large ... retrieved 2020-12-23 Wikimedia Commons has media related to Quadriceps femoris muscles. Quadriceps muscle at the Duke ... The quadriceps femoris muscle is subdivided into four separate muscles (the 'heads'), with the first superficial to the other ... The quadriceps femoris muscle is the most common site of myositis ossificans. In strength training, the quadriceps are trained ...

https://en.wikipedia.org/wiki/Quadriceps

... and attaches with the other muscles of the quadriceps in the quadriceps tendon. The vastus medialis muscle originates from a ... Vastus medialis muscle Vastus medialis muscle Vastus medialis muscle Vastus medialis muscle Vastus medialis muscle Muscles of ... It is involved in knee extension, along with the other muscles which make up the quadriceps muscle. The vastus medialis also ... The vastus medialis is part of the quadriceps muscle group. The vastus medialis is a muscle present in the anterior compartment ...

https://en.wikipedia.org/wiki/Vastus_medialis

... who recommends it for lengthening the quadriceps muscle). The yoga scholar Mark Singleton notes that a pose similar to Supta ...

https://en.wikipedia.org/wiki/Virasana

Squats train the quadriceps, hamstrings, calves, gluteal muscles, and core. The height of the squat can be adjusted to be ... The chin-up focuses on the biceps muscles, rather than the latissimus dorsi muscle which is the focus of the pull-up. For a ... Muscle-ups An intermediate calisthenics exercise. Performed by a combination routine of a pull-up followed by a dip. May be ... The primary muscle involved in this exercise is the rectus abdominis, especially if a posterior pelvic tilt is maintained. ...

https://en.wikipedia.org/wiki/Calisthenics

... the quadriceps tendon works with the quadriceps muscle to extend the leg. All four parts of the quadriceps muscle attach to the ... If the quadriceps tendon is completely torn, surgery will be required to regain function of the knee. Without the quadriceps ... It attaches the quadriceps to the top of the patella, which in turn is connected to the shin from its bottom by the patellar ... A tendon connects muscle to bone, while a ligament connects bone to bone. Injuries are common to this tendon, with tears, ...

https://en.wikipedia.org/wiki/Quadriceps_tendon

However, he played in 15 games despite a torn quadriceps muscle. Barber had a disappointing 2010 season as the entire Cowboys ... On August 27 in the third pre-season game, Barber hurt his calf muscle and missed the first three games of the regular season ...

https://en.wikipedia.org/wiki/Marion_Barber_III

... a large muscle in the quadriceps, is typical. If the central tendon branches within a pennate muscle, the muscle is called ... muscle mass}} \over {\rho \cdot {\text{fiber length}}}},} where ρ is the density of the muscle: ρ = muscle mass muscle volume ... 1C), as seen in the deltoid muscle in the shoulder. One advantage of pennate muscles is that more muscle fibers can be packed ... A pennate or pinnate muscle (also called a penniform muscle) is a type of skeletal muscle with fascicles that attach obliquely ...

https://en.wikipedia.org/wiki/Pennate_muscle

Brendon tore a quadriceps muscle. He said after the game he could miss the rest of the year and was placed on the Injured ...

https://en.wikipedia.org/wiki/Brendon_Ayanbadejo

Her junior year was limited by a strained left quadriceps muscle. In 2007 Shalonda Solomon announced she would forgo her senior ...

https://en.wikipedia.org/wiki/Shalonda_Solomon

Quadriceps strengthening is commonly suggested because the quadriceps muscles help to stabilize the patella. Quadriceps ... The majority of exercise programs intended to treat PFPS are designed to strengthen the quadriceps muscles. Quadriceps ... Risk factors include trauma, increased training, and a weak quadriceps muscle. It is particularly common among runners. The ... However, there is no enough evidence that supports lumbopelvic spine manipulation has any effect on the quadriceps muscle ...

https://en.wikipedia.org/wiki/Patellofemoral_pain_syndrome

... both quadriceps muscles are stimulated to provide a standing posture. Electrodes are placed over the quadriceps muscles and ... High intensity FES of the quadriceps muscles allows patients with complete lower motor neuron lesion to increase their muscle ... When the neuroprosthesis is turned on, both quadriceps muscles are stimulated to provide a standing posture. Kralj's approach ... Electrodes are placed over the quadriceps muscles and peroneal nerves bilaterally. The user controls the neuroprosthesis with ...

https://en.wikipedia.org/wiki/Functional_electrical_stimulation

Tumor was intertwined with quadriceps muscles, making identification and excision difficult. Tumor was successfully excised ... An alternative hypothesis is an origin from the smooth muscle of the nipple. Leiomyoma may spontaneously occur in any muscle. ... that are thought to arise from vascular smooth muscle Dartoic (or genital) leiomyomas originating in the dartos muscles of the ... A leiomyoma, also known as a fibroid, is a benign smooth muscle tumor that very rarely becomes cancer (0.1%). They can occur in ...

https://en.wikipedia.org/wiki/Leiomyoma

"Carnosine and anserine concentrations in the quadriceps femoris muscle of healthy humans". Eur. J. Appl. Physiol. 64 (1): 47-50 ... β-alanine is converted within muscle cells into carnosine, which acts as a buffer for the lactic acid produced during high- ... Supplementation with β-alanine has been shown to increase the concentration of carnosine in muscles, decrease fatigue in ... Occurring at 17-25 mmol/kg (dry muscle), carnosine (β-alanyl-L-histidine) is an important intramuscular buffer, constituting 10 ...

https://en.wikipedia.org/wiki/Β-Alanine

Poturak later revealed that his quadriceps muscle was torn during the fight. He was scheduled to fight Petr Vondráček during ...

https://en.wikipedia.org/wiki/Daniel_Ghiță

"Carnosine and anserine concentrations in the quadriceps femoris muscle of healthy humans". Eur. J. Appl. Physiol. 64 (1): 47-50 ... Exercise has conversely been found to increase muscle carnosine concentrations, and muscle carnosine content is higher in ... Carnosine has a pKa value of 6.83, making it a good buffer for the pH range of animal muscles. Since beta-alanine is not ... It also buffers pH in muscle cells, and acts as a neurotransmitter in the brain. It is also a zwitterion, a neutral molecule ...

https://en.wikipedia.org/wiki/Carnosine

This is a very intense work out for the quadriceps muscles and it can be very painful to hold this position for extended ... While a burning feeling in the quadriceps muscles is normal, if the participant feels even a little pain in their knee or ... A wall sit is an exercise done to strengthen the quadriceps muscles. A similar physical activity is known as the jetliner ... Wall sitting primarily builds isometric strength and endurance in glutes, calves, quadriceps, hamstrings, and adductor muscles ...

https://en.wikipedia.org/wiki/Wall_sit

Lindh M (1979). "Increase of muscle strength from isometric quadriceps exercises at different knee angles". Scand J Rehabil Med ... While dynamic exercises are slightly better than isometric exercises at enhancing the twitch force of a muscle, isometrics are ... Isometric exercise tools perform exercises or strength test using static contraction of a muscle without any visible movement ... These isometric contractions recruit muscle fibers that are often neglected in some dynamic exercises. For example, gymnasts ...

https://en.wikipedia.org/wiki/Isometric_exercise_device

Given that the quadriceps muscles work to pull the tibia forward, an overpowering contraction of the quadriceps can place ... Quadriceps dominance refers to a tendency of female athletes to preferentially use the quadriceps muscles to stabilize the knee ... In addition, the quadriceps femoris muscle is an antagonist to the ACL. According to a study done on female athletes at the ... Because of the elevated contraction of the quadriceps femoris muscle during physical activity, an increased strain is placed ...

https://en.wikipedia.org/wiki/Anterior_cruciate_ligament_injury

Seimone Augustus missed two games in June with a strained quadriceps muscle. Jessica Adair underwent arthroscopic surgery on ...

https://en.wikipedia.org/wiki/2012_Minnesota_Lynx_season

The muscle architecture of pennate muscles, such as the human quadriceps, is highly plastic and strongly influences contractile ... is a feature of pennate muscle defined by the ratio between the longitudinal strain of the muscle and muscle fiber strain. It ... In pennate muscles, fibers are oriented at an angle to the muscle's line of action and rotate as they shorten, becoming more ... Changes to pennate muscle architectural properties, such as pennation angle and thereby the PCSA, can alter the muscle's force- ...

https://en.wikipedia.org/wiki/Architectural_gear_ratio

He did not complete physical testing, however, due to a strained quadriceps muscle. South Australian junior high performance ...

https://en.wikipedia.org/wiki/Jack_Graham_(Australian_footballer,_born_1998)

Hart, Joseph M.; Kuenze, Christopher M.; Diduch, David R.; Ingersoll, Christopher D. (1 December 2014). "Quadriceps Muscle ... athletes were told to exercise so intensely that they developed severe muscle damage that caused extensive muscle soreness. ... The fit should be snug so as to not move freely, but still allow expansion for when muscles contract and fill with blood. ... Although cooling delayed swelling, it did not hasten recovery from this muscle damage. Due to inhibitory effects of ice on ...

https://en.wikipedia.org/wiki/RICE_(medicine)

Common problems during recovery include strengthening of the quadriceps, IT-band, and calf muscles.[citation needed] The main ... Use of the quadriceps tendon usually does not result in the same degree of anterior knee pain postoperatively, and quadriceps ... which include the quadriceps, hamstrings, gastrocnemius, tibialis anterior (shin muscle), abductor hallucis, abductor digiti ... The quadriceps tendon has approximately 20% greater collagen per cross-sectional area than the patellar tendon, and a greater ...

https://en.wikipedia.org/wiki/Anterior_cruciate_ligament_reconstruction

In the lower extremities, muscle tone is increased at the hamstrings, quadriceps and ankles. Weakness is most notable at the ... a voluntary muscle relaxant to relax muscles and reduce tone. This can be administered orally or intrathecally. (Studies in HSP ... to reduce muscle overactivity (existing studies for spasticity ) Botulinum toxin - to reduce muscle overactivity (existing ... Celletti C, Camerota F. Preliminary evidence of focal muscle vibration effects on spasticity due to cerebral palsy in a small ...

https://en.wikipedia.org/wiki/Hereditary_spastic_paraplegia

Towards the end of the season, he tore a quadriceps muscle during a game. Due to his quadriceps injury, Thames fell in the 2008 ... Thames signed with the Blue Jays and had surgery to repair the torn muscle. He began his professional career with the Dunedin ... His playing time was limited by recurring difficulty with the quadriceps injury, and he also played rehab games for the Gulf ...

https://en.wikipedia.org/wiki/Eric_Thames

The leg extension is a resistance weight training exercise that targets the quadriceps muscle (m. quadriceps femoris) in the ... especially antagonistic muscle pairs (such as the quadriceps, hamstrings, and gluteal muscles), to avoid muscular imbalances, ... The leg extension is an isolated exercise targeting one specific muscle group, the quadriceps. It should not be considered as a ... "Range of Motion and Leg Rotation Affect Electromyography Activation Levels of the Superficial Quadriceps Muscles During Leg ...

https://en.wikipedia.org/wiki/Leg_extension

The major muscles impacted involve four (4) motions important to locomotion: Thigh muscles responding to cutaneous reflex Lower ... The knee jerk reflex is a common example of a monosynaptic reflex when one is looking at the quadriceps motor response of ... Observed EMG muscle responses to SF stimulation help to explain how this reflexive response is accomplished: Increased biceps ... The response is, therefore, one which activates the leg muscles in a way as to prepare for that possibility. EMG responses to ...

https://en.wikipedia.org/wiki/Cutaneous_reflex_in_human_locomotion

Its function is to provide an attachment for the ascending tendon of the gluteus maximus muscle. It may function as (1) a ... similar to how quadriceps determines the size and shape of the tibial tuberosity, and thereby the shape of the third trochanter ...

https://en.wikipedia.org/wiki/Third_trochanter

... a calf muscle) and vastus intermedius (VI; a deep layered quadriceps muscle), which are composed mostly of the slow Type I ... The collective observations clearly show that these types of muscle undergo significant reductions in muscle mass (muscle ... decline in quadriceps and hamstring muscle volume measured by MRI scans were noted in two subjects. Reductions in muscle ... volume of quadriceps muscle decreased by 8%, hamstrings decreased by 10%, and plantar flexor muscles were reduced by 14%. ...

https://en.wikipedia.org/wiki/Physiological_effects_in_space

The stapedius in the middle ear of humans, as well as the rectus femoris of the quadriceps are examples of bipennate muscles. ... The parallel muscle architecture is found in muscles where the fibers are parallel to the force-generating axis. These muscles ... Muscles with short fibers will have higher PCSA per unit muscle mass, thus greater force production, while muscle with long ... Pennate muscles can be further divided into uni-, bi- or multipennate. Unipennate muscles are those where the muscle fibers are ...

https://en.wikipedia.org/wiki/Muscle_architecture

He described it as he was running downhill and suddenly something hit him in a quadriceps. He made a few steps, but had to stop ... Extensive training gradually his built muscles and success in local competitions, both in ski and foot orienteering. ...

https://en.wikipedia.org/wiki/Martin_Johansson_(orienteer,_born_1984)

One recurring problem in ACL rehabilitation is improving muscle strength of the quadriceps without re-injury. Early, high-force ... Eccentric muscle contractions are considered to be negative work as the muscle is working with resistance. Negative work is the ... Heat Elastic recoil The energy that is absorbed by the muscle will be dissipated as heat if the muscle is being used as a " ... To strengthen muscle the external force must exceed the muscle while it lengthens. The definition of eccentric contraction is ...

https://en.wikipedia.org/wiki/Eccentric_training

It can also be executed by using a weight, such as a barbell, to provide resistance to the action of the calf muscles. The ... If one were to place a padded barbell on the upper quadriceps to add resistance, this would make the arms less able to ... The soleus is a slow-twitch muscle and will benefit from high reps and lower loads on the seated calf raise. "5 Machines to ... The gastrocnemius is actually made up of fast-twitch muscle fibres, which benefit more from heavy loads and low reps (6-8) on ...

https://en.wikipedia.org/wiki/Calf_raises

Robison suffered a deep right knee and patella tendon bruise, and a quadriceps muscle strain, that sat him out for two games. ...

https://en.wikipedia.org/wiki/Brian_Robison

... including the psoas muscle. Individuals with severe and long-standing sacroiliac joint dysfunction can develop muscle ... Patients with sacroiliac joint dysfunction can also develop tightness and dysfunction in the hamstring, quadriceps, iliotibial ... Any of these muscles can be involved or spasm with a painful and dysfunctional sacroiliac joint. The SI joint is a pain- ... Certain biomechanical or muscle length imbalances may ultimately predispose a person to sacroiliac dysfunction and pain. Likely ...

https://en.wikipedia.org/wiki/Sacroiliac_joint_dysfunction

The result of this motor nerve activity is contraction of the quadriceps muscle, leading to extension of the lower leg at the ... In the case of peripheral muscle reflexes (patellar reflex, achilles reflex), brief stimulation to the muscle spindle results ... the tap initiates an action potential in a specialized structure known as a muscle spindle located within the quadriceps. This ... in this case the hamstring muscles). The relaxation of the opposing muscle facilitates (by not opposing) the extension of the ...

https://en.wikipedia.org/wiki/Reflex_arc

Their quadriceps are likely to be unaffected. They may be absent sensation below the knees and in the groin area. Disabled ... They may have involuntary muscles spasms on one side of their body. They have fine motor control on their dominant side of the ... Neurological level: S1-S2." People with a lesion at S1 have their hamstring and peroneal muscles affected. Functionally, they ...

https://en.wikipedia.org/wiki/S10_(classification)

... the opposing muscle to the quadriceps, an inhibitory postsynaptic potential (IPSP) is produced in the quadriceps motor neuron. ... When a current is passed into the sensory neuron in the quadriceps, the motor neuron innervating the quadriceps produced a ... the muscle spindle fibre) and the motor neuron. The sensory neuron synapses onto the motor neuron in the spinal cord. ... thus contracting the quadriceps. On the other hand, IPSPs could subtract from this sum of EPSPs, preventing the motor neuron ...

https://en.wikipedia.org/wiki/John_Eccles_(neurophysiologist)

... reactivate the quadriceps muscle, and restore range of motion. Early weight bearing is encouraged as tolerated, using crutches ... The MPFL arises from the fibers of the vastus medialis obliquus muscle and attaches distally to the superior medial aspect of ... Above the anterior arm attachment of the semimembranosus muscle tendon, the tibial attachment of the central arm of the POL is ... Patellofemoral mobilization, quadriceps reactivation, and frequent ankle pumps are also utilized right after surgery to prevent ...

https://en.wikipedia.org/wiki/Medial_knee_injuries

Muscle redundancy means that the same net joint torque could be generated by many different relative contributions of ... cross-sectional area and neural activation during strength training and detraining of the human quadriceps". European Journal ... "Kinesiology.com - manual muscle testing MMT". kinesiology.com. Archived from the original on 7 November 2017. Retrieved 27 ... Motor unit redundancy means that for the same net muscle force could be generated by many different relative contributions of ...

https://en.wikipedia.org/wiki/Kinesiology

As a freshman in 2003, he sustained a torn quadriceps muscle and was a redshirt. In 2004, he missed the entire season after ... a rare condition that results in inability to control facial muscles on the affected side and can also cause facial paralysis. ... sustaining a separated shoulder, another torn leg muscle and being diagnosed with Bell's Palsy, ...

https://en.wikipedia.org/wiki/Billy_Pittman

... after fighting with D-X to a no-contest in a match that saw Triple H suffer a legitimate torn right quadriceps muscle. The next ...

https://en.wikipedia.org/wiki/Rated-RKO

The patient is asked to actively contract the quadriceps muscle while the examiner's hand exerts pressure on the superior pole ...

https://en.wikipedia.org/wiki/Clarke's_test

Kennard was inactive for the Giants' Week 10 loss at the San Francisco 49ers due to a quadriceps injury. On December 4, 2017, ... Kennard sat out the 2012 season with a torn chest muscle. In 2013, Kennard started all thirteen games at outside linebacker, ...

https://en.wikipedia.org/wiki/Devon_Kennard

Along with patellar ligament and quadriceps femoris, semitendinosus/gracilis (STG) tendon autografts has been used commonly and ... Semitendinosus muscle Semitendinosus muscle Semitendinosus muscle Muscles of thigh. Lateral view. Muscles of thigh. Cross ... The semitendinosus muscle is one of three hamstring muscles that are located at the back of the thigh. The other two are the ... These three muscles work collectively to flex the knee and extend the hip. The muscle also helps to medially rotate the tibia ...

https://en.wikipedia.org/wiki/Semitendinosus_muscle

... than the muscles of the quadriceps, which allows for finer control of the force a finger applies. In general, α-MNs on one side ... denervated muscles are prone to atrophy. A secondary cause of muscle atrophy is that denervated muscles are no longer supplied ... Voluntary muscle control is lost because α-MNs relay voluntary signals from upper motor neurons to muscle fibers. Loss of ... Muscle weakness and atrophy are inevitable consequences of α-MN lesions as well. Because muscle size and strength are related ...

https://en.wikipedia.org/wiki/Alpha_motor_neuron

... thereby putting pressure on the quadriceps muscles. The bulge did not appear when the patients were sitting or standing. MRI ... Diamond on quadriceps sign: The sign is related to dysferlinopathy. A clinical study of 31 patients revealed that the patients ... The sign was evident in patients with little calf muscle enlargement and visibly positive in DMD cases with 90% sensitivity. ... The technique advises surface stimulation of the intercostal skin while using specific sites of the rectus abdominis muscle for ...

https://en.wikipedia.org/wiki/Sunil_Pradhan

... motor unit mouth mucoperiosteum mucosa mucous membranes multifidus muscle muscle fascicle muscle spindle muscle tissue muscles ... system pyramidal tract pyriform cortex pyriform lobe quadrangular membrane quadrangular space quadrate quadratojugal quadriceps ... of retina rectum rectus abdominis muscle rectus capitis anterior muscle rectus capitis lateralis muscle rectus femoris muscle ... levator muscle levator labii superioris muscle levator palpebrae muscle levator palpebrae superioris levator scapulae muscle ...

https://en.wikipedia.org/wiki/Index_of_anatomy_articles

... with a strained left quadriceps muscle. With a record of 46-59 at the July 31 trade deadline, the team traded Mark Teixeira and ...

https://en.wikipedia.org/wiki/History_of_the_Texas_Rangers_(baseball)

The rehab can be divided into protection of the graft, improving range of motion, decrease swelling, and regaining muscle ... quadriceps tendon, and an allograft. Although extensive research has been conducted on which grafts are the best, the surgeon ... maximize full muscle strength, and decrease risk of reinjury. Typically, three phases are involved in nonoperative treatment - ... with no significant differences in regard to knee function or muscle strength reported by the patients. The main goals to ...

https://en.wikipedia.org/wiki/Anterior_cruciate_ligament

Romero had been pitching with torn quadriceps tendons in both legs. Romero began the 2015 season on the disabled list of the ... but was placed on the 15-day disabled list on April 20 with a strained right oblique muscle after a violent sneeze. The Jays, ...

https://en.wikipedia.org/wiki/Ricky_Romero

The anterior thigh muscles form the quadriceps which is inserted on the patella with a common tendon. Three of the four muscles ... The muscles of the hip are divided into a dorsal and a ventral group. The dorsal hip muscles are either inserted into the ... The lateral superficial muscles, the transversus and external and internal oblique muscles, originate on the rib cage and on ... The ventral hip muscles are important in the control of the body's balance. The internal and external obturator muscles ...

https://en.wikipedia.org/wiki/Pelvis

... "the most frequently and severely affected muscle." Of the quadriceps muscles, the rectus femoris is preferentially affected Of ... Muscle MRI is useful for assessment of all the muscles in the body. Muscles can be scored based on the degree of fat ... These muscles can be spared and other muscles usually are affected. The order of muscle involvement can cause the appearance of ... Muscle MRI is sensitive for detecting muscle damage, even in mild cases. Because of the particular muscle involvement patterns ...

https://en.wikipedia.org/wiki/Facioscapulohumeral_muscular_dystrophy

... View/. Open. EMHJ_2000_6_5-6_1136_1138.pdf ... Abou Salem, O.T. (‎2000)‎. Tuberculous abscesses of the quadriceps femoris muscle without osseous involvement. EMHJ - Eastern ...

https://apps.who.int:80/iris/handle/10665/118981

The quadriceps are a set of four muscles on the front of your thighs. Keep them strong to maintain function in your legs and ... The consequences of muscle atrophy in the quadriceps goes far beyond a decrease in muscle strength. Decreased muscle tone and ... A decrease in muscle strength accompanies this decrease in muscle size. Muscle atrophy results in decreased muscle tone, which ... Lastly, sarcopenia, the loss of muscle mass associated with aging, is another common cause of quadriceps muscle atrophy. ...

https://www.livestrong.com/article/366527-the-quadriceps-muscle-atrophy/

... Ansicht/. Öffnen. EMHJ_2000_6_5-6_1136_1138 ... Abou Salem, O.T. (‎2000)‎. Tuberculous abscesses of the quadriceps femoris muscle without osseous involvement. EMHJ - Eastern ...

https://extranet.who.int/iris/restricted/handle/10665/118981?locale-attribute=de&

Conclusion: Isometric endurance of the quadriceps muscle is reduced in patients with COPD and the muscle oxidative profile is ... Peripheral muscle function, morphology and enzymology. Muscle mass, strength and endurance. Patients with COPD had muscle ... Because the perception of muscle fatigue is subjective and the measurement of muscle endurance is effort dependent, muscle ... Mador MJ, Deniz O, Aggarwal A, et al. Quadriceps fatigability after single muscle exercise in patients with chronic obstructive ...

https://thorax.bmj.com/content/59/8/673?ijkey=e66aba882a18b37275a7ce7cebfdda65f87b230a&keytype2=tf_ipsecsha

Whole Body Leucine Kinetics and Fractional Quadriceps Muscle Synthetic Rate (MPSR) in Alcoholic Patients P.J. Pacy; P.J. Pacy ... P.J. Pacy, M Read, V. Preedy, T.J. Peters, D Halliday; Whole Body Leucine Kinetics and Fractional Quadriceps Muscle Synthetic ...

https://portlandpress.com/clinsci/article-abstract/75/s19/36P/105107/Whole-Body-Leucine-Kinetics-and-Fractional?redirectedFrom=fulltext

T1 - Equal effectiveness of electrical and volitional strength training for quadriceps femoris muscles after anterior cruciate ... Equal effectiveness of electrical and volitional strength training for quadriceps femoris muscles after anterior cruciate ... title = "Equal effectiveness of electrical and volitional strength training for quadriceps femoris muscles after anterior ... Equal effectiveness of electrical and volitional strength training for quadriceps femoris muscles after anterior cruciate ...

https://www.scholars.northwestern.edu/en/publications/equal-effectiveness-of-electrical-and-volitional-strength-trainin

Quadriceps muscle pain, RPE, work rate, heart rate (HR), and oxygen uptake (VO2) were recorded every 5 min during exercise, and ... The effects of an oral dose of ginger on quadriceps muscle pain, rating of perceived exertion (RPE), and recovery of oxygen ... Acute effects of dietary ginger on quadriceps muscle pain during moderate-intensity cycling exercise. Int J Sport Nutr Exerc ... MSI Funded Study: Acute effects of dietary ginger on quadriceps muscle pain during moderate-intensity cycling exercise. Black ...

https://www.mccormickscienceinstitute.com/our-research/reports/msi-funded-study-ginger-and-quadriceps-muscle-pain

N2 - Quadriceps muscle biopsy was performed in 7 definite and 45 possible carriers of Duchenne muscular dystrophy. Unequivocal ... AB - Quadriceps muscle biopsy was performed in 7 definite and 45 possible carriers of Duchenne muscular dystrophy. Unequivocal ... Quantitative analysis of quadriceps muscle biopsy. Results in 7 definite and 45 possible carriers of duchenne muscular ... Quadriceps muscle biopsy was performed in 7 definite and 45 possible carriers of Duchenne muscular dystrophy. Unequivocal ...

https://moh-it.pure.elsevier.com/en/publications/quantitative-analysis-of-quadriceps-muscle-biopsy-results-in-7-de

The Muscle PhD. "My goal is to take challenging and complex concepts and package them into understandable lessons so that they ... Charlie performs double duty by being the Content Manager for The Muscle PhD as well as the Director of Human Performance at ...

https://themusclephd.com/anatomy-of-the-quadriceps/

Muscle Thickness. Muscle thickness was measured at the quadriceps and biceps before and after the exercise program with B-mode ... Individual responses for lean tissue mass (A), biceps muscle thickness (B), and quadriceps muscle thickness (C) from baseline ... Biceps and quadriceps muscle thickness increased (p , 0.01) with no difference between groups. There was a group × time ... There were no differences in lean tissue mass over time or between groups (Table 1 and Figure 2A). Biceps and quadriceps muscle ...

https://journals.lww.com/nsca-jscr/Fulltext/2020/07000/Effects_of_Training_With_Free_Weights_Versus.6.aspx?context=FeaturedArticles&collectionId=1

The Effect of Warm-Up and Cool-Down Exercise on Delayed Onset Muscle Soreness in the Quadriceps Muscle: a Randomized Controlled ... Normal isometric and isokinetic peak torques of hamstring and quadriceps muscles in young adult Saudi males. Neurosciences, ... Maximal force, voluntary activation and muscle soreness after eccentric damage to human elbow flexor muscles. J Physiol (Lond ... Takizawa K, Soma T, Nosaka K, Ishikawa T, Ishii K. Effect of warm-up exercise on delayed-onset muscle soreness. Eur J Sport Sci ...

http://psjd.icm.edu.pl/psjd/element/bwmeta1.element.-psjd-doi-10_2478_v10078-012-0079-4

For your consultation and accurate pricing please send an email to us at [email protected] with photos of your area of concern and a photo of what you are looking to achieve. Include a contact email and phone number, and we will reach out to you for a PHONE consultation.. ...

https://www.bestbodyimplants.com/virtual-consultations/

This lateral growth of the femur abuts the tensor fasciae latae and lateral quadriceps muscles. The bursa provides lubrication ... 6, 13, 14] This muscle is a combination of the psoas major muscle (originating at the lateral surface of the T12-L4 vertebral ... The hamstrings function as hip extensors and consist of the semitendinosus muscle, semimembranosus muscle, and the biceps ... making it the only quadriceps muscle to do so. It functions as a hip flexor and knee extender, and it receives innervation from ...

https://www.medscape.com/answers/87169-62484/which-questions-aid-in-ruling-out-spinal-causes-of-pain-during-the-evaluation-of-hip-tendonitis

... quadriceps muscle Tricompartment offloader knee brace reduces sagittal plane knee moments, quadriceps muscle activity, and pain ... quadriceps muscle activity, and pain in individuals with multicompartment knee OA. Lower limb kinematics, kinetics, and ...

https://pesquisa.bvsalud.org/portal/resource/pt/mdl-37030895

Muscle Strength* * Pain, Postoperative / psychology* * Prospective Studies * Quadriceps Muscle / physiopathology* * Range of ... Joint awareness after total knee arthroplasty is affected by pain and quadriceps strength Orthop Traumatol Surg Res. 2016 Jun; ... FJS was affected most greatly by pain at 1 month and by quadriceps strength at 6 and 12 months. ... Outcomes included joint awareness assessed using the Forgotten Joint Score (FJS), pain score, knee ROM, quadriceps strength, ...

https://pubmed.ncbi.nlm.nih.gov/27052936/

Biarticular and monoarticular skeletal muscle activation and injury in human quadriceps muscle. In: Eur. J. Appl. Physiology. ... Prior, BM & Jayaraman, RC 2001, Biarticular and monoarticular skeletal muscle activation and injury in human quadriceps muscle ... Biarticular and monoarticular skeletal muscle activation and injury in human quadriceps muscle. / Prior, B. M.; Jayaraman, Roop ... Biarticular and monoarticular skeletal muscle activation and injury in human quadriceps muscle. Eur. J. Appl. Physiology. 2001 ...

https://scholars.cmich.edu/en/publications/biarticular-and-monoarticular-skeletal-muscle-activation-and-inju

Patello-femoral joint biomechanics is influenced by the direction and magnitude of force exerted by quadriceps muscle which may ... Patello-femoral joint biomechanics is influenced by the direction and magnitude of force exerted by quadriceps muscle which may ... nbsp;KEY WORDS: Knee Osteoarthritis, Foot Arch Index, Quadriceps Angle, Foot pain, Knee pain, ... nbsp;KEY WORDS: Knee Osteoarthritis, Foot Arch Index, Quadriceps Angle, Foot pain, Knee pain, ...

https://academicjournals.org/journal/AJHST/article-references/03779A869044

Myopathy of the quadriceps muscles. J Neurol Sci. 1968 Sep-Oct. 7(2):201-6. [QxMD MEDLINE Link]. ... Hereditary quadriceps myopathy. J Neurol Neurosurg Psychiatry. 1973 Dec. 36(6):1041-5. [QxMD MEDLINE Link]. [Full Text]. ... Diagnostic muscle biopsies in the era of genetics: the added value of myopathology in a selection of limb-girdle muscular ... Krag TO, Hauerslev S, Sveen ML, Schwartz M, Vissing J. Level of muscle regeneration in limb-girdle muscular dystrophy type 2I ...

https://emedicine.medscape.com/article/313515-followup

During reproduction, the neuromuscular activity of the quadriceps muscle was assessed by surface electromyography. ... Possible differences in hip muscle characteristics between men and women with FAIS are unknown. Purpose To compare hip muscle ... The main outcome measures were side-to-side percentage asymmetry in hip muscle CSA and involved-side fatty infiltration as ... Women showed greater hip abductor muscle atrophy than men, particularly for the gluteus medius, while men showed a higher ...

https://www.researchgate.net/institution/Bern-University-of-Applied-Sciences

Vaccine should not be administered in the gluteal (buttocks) or quadriceps (thigh) muscle. After vaccination, testing for ... which is more easily administered in the deltoid muscle. However, the 250-mg dose is recommended because it may delay the ...

https://www.cdc.gov/mmwr/preview/mmwrhtml/00001459.htm

Quadriceps Muscle Quadrigeminal Plate use Tectum Mesencephali Quadriparesis use Quadriplegia Quadriplegia Quadriplegic ...

https://decs.bvs.br/I/DeCS2009_Alfab-Q_ing.htm

Measuring the isokinetic strength of the knee extensors (quadriceps) will assess muscle strength. ... Timed walk & muscle strength time (sec). English Text: Timed walk & muscle strength time (sec). Target: Both males and females ... Timed walk and muscle strength status. English Text: Timed walk and muscle strength status Target: Both males and females 50 ... Timed walk and muscle strength comments. English Text: Timed walk and muscle strength comments. Target: Both males and females ...

https://wwwn.cdc.gov/Nchs/Nhanes/2001-2002/MSX_B.htm

Effects of exposure to normobaric hyperoxia on the recovery of local muscle fatigue in the quadriceps femoris of young people. ... Effects of exposure to normobaric hyperoxia on the recovery of local muscle fatigue in the quadriceps femoris of young people. ... Effects of quadriceps muscle fatigue on stiff-knee gait in patients with hemiparesis.. ... Electromagnetic Acupuncture to Enhance the Effects of Manual Acupuncture on Recovery from Muscle Fatigue of the Quadriceps Soo- ...

https://docksci.com/electromagnetic-acupuncture-to-enhance-the-effects-of-manual-acupuncture-on-reco_5a7d4d5ed64ab26035a293df.html

FocusOnFitness: Squats - Build Stability and Working the Leg Muscles, Quadriceps, Hamstrings and Calves. 2 of 4 in this ... This is to give you an idea of the motion that a Squat consists of and to give you a sense of the group of muscles involved. ... Core exercises: Why you should strengthen your core muscles. You know core exercises are good for you - but do you include core ...

https://blindabilities.com/?p=5721

Smaller than normal quadriceps muscles on the front of the thigh. Tests that may be done include:. *Electromyography (EMG) to ... It helps the muscles move the hip and straighten the leg. It provides feeling (sensation) to the front of the thigh and part of ... If so, any treatment, such as physical therapy and occupational therapy, is aimed at increasing mobility, maintaining muscle ... This will include an exam of the nerves and muscles in your legs. ... health of the muscles and the nerves that control the muscles. ...

https://medlineplus.gov/ency/article/000687.htm

Knee extensor muscle weakness is a risk factor for the development of knee osteoarthritis: an updated systematic review and ... Knee extensor muscle weakness is a risk factor for the development of knee osteoarthritis: an updated systematic review and ... Objective To update a systematic review on the association between knee extensor muscle weakness and the risk of incident knee ... Discussion There is low quality evidence that knee extensor muscle weakness is associated with incident symptomatic and ...

https://bjsm.bmj.com/content/early/2021/12/15/bjsports-2021-104861?versioned=true

Muscles activated: quadriceps, hamstrings, glutes, obliques. *Set yourself up in a stationary lunge holding onto each end of ... It realizes the muscle was not strong enough to start with, so it "knits" those tears together to make our muscles stronger and ... We do develop bigger, denser muscles when we weight train, but how big our muscles develop really depends on our body type. ... For example, if you are a mesomorph (who builds muscle easily), and you do not want too much bulk on your frame, then you would ...

https://www.alive.com/fitness/weight-training-for-women/

Stretch your legs, especially your calves, hamstrings, quadriceps, and thigh muscles. After activity, hold your stretches for ... Work different muscle groups to keep yourself in good shape overall and to prevent overusing individual muscles. ... It connects the heel bone to the calf muscles. What Are the Signs & Symptoms of Achilles Tendonitis?. Achilles tendonitis ... strengthening the surrounding muscles to take stress off the Achilles and help support the ankle ...

https://kidshealth.org/Levine/en/teens/achilles.html?WT.ac=t-ra

https://www.kidshealth.org/InteractiveHealth/en/teens/achilles.html

Does flywheel paradigm training improve muscle volume a ... Quadriceps muscle use in the flywheel and barbell squat. Aviat ... 43) reported increases of 9.8 (ES 0.85) to 15.1% (ES 0.83) in quadriceps muscle mass. These values were slightly higher than ... Muscle Volume. The analysis of muscle volume showed that the average ES the experimental group (0.75; n = 7) was significantly ... 59) revealed a significant increase in quadriceps muscle mass with the flywheel system, whereas hypertrophy increased ...

https://journals.lww.com/nsca-jscr/Fulltext/2017/11000/Does_Flywheel_Paradigm_Training_Improve_Muscle.28.aspx

Build Stability and Working the Leg Muscles, Quadriceps, Hamstrings and Calves. (blindabilities.com)
While they don't have the flash or panache of a push-up or side plank , they work almost every muscle group in your body - from your calves and glutes to your core and shoulders. (askmen.com)
This workout targets the hamstrings, quadriceps and calves, as well as the inner and outer thighs. (exercise.com)
Leg muscles, especially the quadriceps (thigh), hamstrings (back of thigh), and gastrocnemius (calves), are most likely to cramp, but any skeletal muscle in the body can cramp. (skipperwbreeders.com)
In this exercise, the secondary muscles are the gluteus maximus (butt muscles), the adductor magnus found in the inner thighs and the soleus which is located in the calves. (gymguider.com)
Extra over, free weights usually are not in a position to present good exercises for hamstrings and calves muscle teams. (besthealthierlife.com)
My current training consists of a 5-day routine, where I train each muscle group 1 time a week - Day 1 Back and Pectorals, Day 2 Quadriceps, hamstrings and adductors, Day 3 Biceps and triceps, Day 4 Abdomen and calves and Day 5 Shoulders and trapezius. (computeropruiming.com)
I perform approximately 12 series per muscle group of between 8 and 13 reps (Abdomen and calves I work with series of 20 reps) For the fat loss process I did a cardio session of 35 min a day (generally inclined treadmill at 6km p/h and a heart rate of 135 bpm9). (computeropruiming.com)
Active-Isolated Strengthening is a revolutionary technique in which we pinpoint, isolate and strengthen each individual muscle used to perform as a dancer or athlete at your highest potential: a tool box for the feet, ankles, calves, knees, hamstrings, quadriceps, hip and trunk, back and shoulders with step by step instructions tailored to work specific muscle groups. (worlddancemovement.com)

A middle-aged man with (atypical) anterior horn cell disease presenting with wasting of the right quadriceps. (medscape.com)
Vince Young looked a little rusty in his first game back from a strained right quadriceps muscle. (orlandosentinel.com)
She had pain in her right quadriceps and adductor muscles and was seen for physical therapy to alleviate pain, which allowed her to walk and move around normally and return to her regular activities. (thek9bodyshop.com)

Acute or chronic injuries lead to tenderness of the muscle and tendon. (medscape.com)
2 Albracht K, Arampatzis A. Exercise-induced changes in tricep surae tendon stiffness and muscle strength affect running economy in humans . (thieme-connect.com)
Weak quadriceps muscle: Weakness in the quadriceps muscle, which attaches to the patella, can lead to increased stress on the patellar tendon, causing inflammation and pain. (lustrengththerapy.com)
Tight muscles: If the muscles in the front and back of the thigh are tight, this can put additional stress on the patellar tendon, leading to inflammation and pain. (lustrengththerapy.com)
This condition occurs when a muscle or tendon slides over bony knobs in your hip. (manhattanorthopedic.com)
The quadriceps tendon attaches your four quadriceps muscles to the front of your knee. (manhattanorthopedic.com)
Quadriceps tendon tears aren't very common and most often occur in middle-aged people who participate in running and jumping sports. (manhattanorthopedic.com)
Early operative repair is indicated for all acute complete quadriceps tendon ruptures, provided that the patient is a suitable surgical candidate. (medscape.com)
No contraindications for acute repair of quadriceps tendon ruptures exist, provided that the patient is an adequate surgical candidate. (medscape.com)
Early surgical repair yields the best results for complete quadriceps tendon ruptures. (medscape.com)
A small (N = 4) pilot study by Severyns et al described a technique method for arthroscopic reattachment of the quadriceps tendon with suture anchors. (medscape.com)
The patella, the largest of the sesamoid bones, overlies the front of the kneejoint in the tendon of the quadriceps extensor. (co.ma)
the anterior area so defined serves for the attachment of the common tendon of the quadriceps extensor muscle, whilst the posterior, of compressed triangular shape, is covered with synovial membrane. (co.ma)
The sesamoid bone articulates with the underlying bones to prevent damage to the muscle tendon due to rubbing against the bones during movements of the joint. (momentumclubs.org)

These muscles include the glutes, quads, hamstrings, and erector spinae (a group of deep muscles that run from your neck to your pelvis). (saveourbones.com)
Because the glutes are connected to essential muscle groups like the erector spinae (more on that below), the psoas muscle , and core muscles, weakened glutes have a cascade effect. (saveourbones.com)
The glutes even affect muscles in the leg, which are also covered in today's exercise. (saveourbones.com)
What happens is, these other muscle groups have to compensate for the glutes when they are too weak to do their job properly. (saveourbones.com)
The squats also activate you glutes and back muscles. (fitnessprogramer.com)

In order to confirm the usefulness of EMA, we investigated the effects of treatment on muscle fatigue after strenuous knee extension/flexion exercises that had been performed by three groups: the nonstimulation, the manual acupuncture, and the EMA groups. (docksci.com)
Here we explain the hip and groin muscles, their actions and exercises. (sportsinjuryclinic.net)
Specificity kicks in strongest when training at shorter muscle length, so if doing compound exercises you have to be mindful of what muscles are being stretched and which ones are starting out at shorter length. (strongfirst.com)
This regimen includes split squat exercises, including the quadriceps, gluteus maximus, and hamstring muscles. (cdc.gov)
This is also true for the muscular system, and that's why I encourage exercises that work a wide variety of muscle groups. (saveourbones.com)
The effect of quadriceps femoris muscle strengthening exercises on spasticity in children with cerebral palsy. (bvsalud.org)
Range-of-motion (ROM) exercises are then initiated, and quadriceps strengthening is continued until the strength of the injured leg is equal to that of the contralateral leg. (medscape.com)
Depending on the exercises performed, the muscles of the upper or lower body may be more strongly activated, so you can focus on reducing body fat, strengthening muscle mass, and improving your own condition at the same time. (beactive.ie)
The snowboard training exercises also include stretches to combat muscle tension and improve flexibility . (exercise.com)
The snowboard exercises in this workout improve strength in your abs, obliques and lower back -- all muscles you need to stand tall and rotate your upper body. (exercise.com)
Physical exercises to strengthen the quadriceps may also be an option. (petinsurancequotes.com)
Avoiding physical activities that may worsen the pain, stretching the quadriceps and hamstring muscles, and performing warm-up exercises before exercise can improve the condition. (courtneybellmd.com)
A lot of things can cause these muscles and tendons in the back of the knee to feel tight, resulting in that sensation of tightness behind the knee: your activity level, the type of exercises you do and even how you sit throughout the day can contribute. (healthykneesclub.com)

Weakness of the quadriceps muscles is the most often cited area of concern when dealing with patellofemoral pain syndrome, a common disorder characterized by pain in the front of the knee. (livestrong.com)
Objective To update a systematic review on the association between knee extensor muscle weakness and the risk of incident knee osteoarthritis in women and men. (bmj.com)
Meta-analysis estimated the OR for the association between knee extensor muscle weakness and incident knee osteoarthritis. (bmj.com)
Low quality evidence indicated that knee extensor muscle weakness increased the odds of symptomatic knee osteoarthritis in women (OR 1.85, 95% CI 1.29 to 2.64) and in adult men (OR 1.43, 95% CI 1.14 to 1.78), and for radiographic knee osteoarthritis in women: OR 1.43 (95% CI 1.19 to 1.71) and in men: OR 1.39 (95% CI 1.07 to 1.82). (bmj.com)
Discussion There is low quality evidence that knee extensor muscle weakness is associated with incident symptomatic and radiographic knee osteoarthritis in women and men. (bmj.com)
Muscle weakness occurs when the onset is more abrupt. (medscape.com)
Weakness of lower limb muscles may result in the following difficulties: walking, climbing stairs, walking on uneven surfaces, and stumbling over small objects. (medscape.com)
The pattern and distribution of muscle wasting and weakness may localize the lesion to a peripheral nerve or plexus or root. (medscape.com)
Difficulty in walking on the toes and hopping on the toes of one foot are signs of calf muscle weakness. (medscape.com)
Limping gait is a sign of unilateral muscle weakness or arthritis involving the lower limb(s). (medscape.com)
Foot deformity implies weakness of the intrinsic muscles of the feet. (medscape.com)

Normal isometric and isokinetic peak torques of hamstring and quadriceps muscles in young adult Saudi males. (edu.pl)
Isometric and dynamic quadriceps muscle strength was evaluated before and after the intervention. (frontiersin.org)
3 Alegre LM, Ferri-Morales A, Rodriguez-Casares R, Aguado X. Effect of isometric training on the knee extensor moment-angle relationship and vastus lateralis muscle architecture . (thieme-connect.com)
9 Beltman JGM, van der Vliet MR, Sargeant AJ, de Haan A. Metabolic cost of lengthening, isometric and shortening contractions in maximally stimulated rat skeletal muscle . (thieme-connect.com)
11 Bogdanis GC, Selima E, Methenitis S, Veligekas P, Tsoukos A, Terzis G. Changes in muscle strength and vertical jump performance after short-term isometric training at different knee angles . (thieme-connect.com)

Muscles which are commonly biopsied and have normative histopathological data include the deltoid (posterior division), biceps, quadriceps (vastus lateralis) and gastrocnemius muscles. (cuanschutz.edu)
The tibialis posterior muscle runs from it to the posterior edge of the internal malleolus. (momentumclubs.org)
Muscles of the posterior leg attach to this line. (momentumclubs.org)

Hamstring tendonitis involves inflammation in the tendons that connect your thigh muscles to the back of your knee. (manhattanorthopedic.com)
In individuals who undergo TFA, the thigh muscles play an important role in the lower extremities' function [ 9 , 10 ]. (e-arm.org)

Neuromuscular electrical stimulation and voluntary muscle contraction are two exercise modes widely used in rehabilitation to strengthen skeletal muscle. (northwestern.edu)
These data suggest that neuromuscular electrical stimulation and voluntary muscle contraction treatments, when performed at the same intensity, are equally effective in strengthening skeletal muscle that has been weakened by surgical repair of the anterior cruciate ligament. (northwestern.edu)
The results were consistent with related findings showing that ingesting a large dose of aspirin does not acutely alter quadriceps muscle pain during cycling, and this suggests that prostaglandins do not play a large role in this type of exercise-induced skeletal-muscle pain. (mccormickscienceinstitute.com)
Eccentric exercise induced injury to rat skeletal muscle. (edu.pl)
In lean C57BL/6J mice, 6 hours of food withdrawal increased gene transcription levels of IL-6 in skeletal muscle but not in white adipose tissue. (researchgate.net)
My area of expertise lies in skeletal muscle physiology, in particular the importance of muscle mass, strength and function, the underpinning physiological mechanisms that control these and how these can be manipulated to benefit human performance and maximise resilience. (shu.ac.uk)

It connects the heel bone to the calf muscles. (kidshealth.org)
Sitting with your legs crossed or your toes pointed for long periods of time shortens the calf muscles, which could lead to cramping. (skipperwbreeders.com)
The adequate stretching of calf muscles is important for the movement in legs. (himalayanyogaashram.com)
If you're looking to blame a specific muscle for your tight knees, there are two likely culprits: the hamstring muscles and the calf muscles. (healthykneesclub.com)
While both of the two calf muscles, the soleus and gastrocnemius, can contribute to knee tightness, the gastrocnemius crosses behind the knee and is the most likely of the calf muscles to cause tightness in the back of the knee. (healthykneesclub.com)

Eligible criteria for selecting studies Longitudinal studies with at least 2 years follow-up including baseline measure of knee extensor muscle strength, and follow-up measure of symptomatic or radiographic knee osteoarthritis. (bmj.com)
Optimising knee extensor muscle strength may help to prevent knee osteoarthritis. (bmj.com)

A single, powerful muscle attaches to the lesser trochanter. (momentumclubs.org)

Muscle biopsies from m. vastus lateralis were collected before and after the 6-week intervention period to assess long-term myofibrillar MPS and RNA synthesis as well as muscle fiber-type-specific cross-sectional area (CSA), satellite cell content, and myonuclei content. (frontiersin.org)
The medial and lateral borders, of curved outline, receive the insertions of the vastus medialis and lateralis muscles, respectively, the attachment of the vastus medialis being more extensive than that of the vastus lateralis. (co.ma)

Ten apprentice jockeys and 48 horses were instrumented with heart-rate monitors, accelerometers, and a surface electromyography BodySuit (recording 8 muscle groups: quadriceps, hamstrings, gluteal, lower back, obliques, abdominal, trapezial, and pectoral) that recorded continuously while riding their normal morning track-work. (humankinetics.com)

A decrease in muscle strength accompanies this decrease in muscle size. (livestrong.com)
The consequences of muscle atrophy in the quadriceps goes far beyond a decrease in muscle strength. (livestrong.com)
Decreased muscle tone and strength of your quadriceps could increase your risk for developing arthritis or intensify the severity of already existing arthritis in your knee. (livestrong.com)
1- 3 Evaluation of peripheral muscle strength and endurance is now frequently performed in pulmonary rehabilitation settings and exercise physiology laboratories. (bmj.com)
Previous reports have shown that peripheral muscle strength is reduced in COPD, 1- 4 an observation that has been attributed to muscle atrophy. (bmj.com)
J Strength Cond Res 34(7): 1851-1859, 2020-Free weights offer a more unstable training environment, which enhances muscle recruitment, whereas some machines have the advantage of using a "cam" pulley system that better matches strength curves. (lww.com)
We compared the effect of training with free weights vs. machines on muscle mass, strength, free testosterone, and free cortisol concentrations. (lww.com)
Muscle thickness and strength were measured at 0 and 8 weeks. (lww.com)
however, training with free weights or machines resulted in similar increases in muscle mass and strength. (lww.com)
One of the controversies when prescribing resistance training programs is whether the use of free weights or machines is better for building muscle mass and strength. (lww.com)
that is, the constant resistance throughout the range of motion offered by free weights does not always match the strength of a muscle, which varies throughout the range of motion. (lww.com)
The goals of the study were to describe changes in joint awareness in the artificial joint after total knee arthroplasty (TKA), and to determine which factors among pain, knee range of motion (ROM), quadriceps strength, and functional ability affect joint awareness after TKA. (nih.gov)
Patients undergoing TKA demonstrate changes in joint awareness and joint awareness is associated with pain, knee ROM, quadriceps strength, and functional ability. (nih.gov)
Outcomes included joint awareness assessed using the Forgotten Joint Score (FJS), pain score, knee ROM, quadriceps strength, and functional ability. (nih.gov)
FJS was affected most greatly by pain at 1 month and by quadriceps strength at 6 and 12 months. (nih.gov)
Quadriceps strength could contribute to this plateau of joint awareness. (nih.gov)
The loss of muscle mass, muscular strength, and power with age has important health and functional consequences. (cdc.gov)
Measuring the isokinetic strength of the knee extensors (quadriceps) will assess muscle strength. (cdc.gov)
SPs who had a myocardial infarction within the past six weeks, chest or abdominal surgery within the past three weeks, knee surgery or knee replacement surgery, severe back pain, a history of brain aneurysm or stroke are excluded from the muscle strength exam. (cdc.gov)
Six muscle strength measurements are obtained: three warm-up/ learning measurements and three outcome measurements. (cdc.gov)
For further details regarding the quality control procedures, analysts should consult the NHANES Muscle Strength Procedures Manual. (cdc.gov)
Although six muscle strength trials are preformed only the highest peak force is reported in the data file. (cdc.gov)
Muscle Strength Procedures Manual. (cdc.gov)
If so, any treatment, such as physical therapy and occupational therapy, is aimed at increasing mobility, maintaining muscle strength, and independence while you recover. (medlineplus.gov)
J Strength Cond Res 31(11): 3177-3186, 2017-Several studies have confirmed the efficacy of flywheel paradigm training for improving or benefiting muscle volume and force. (lww.com)
The responses identified in this analysis are essential and should be considered by strength and conditioning professionals regarding the most appropriate dose response trends for flywheel paradigm systems to optimize the increase in muscle volume and force. (lww.com)
Different studies conclude that a training protocol that utilizes on the concentric (CON) or only the eccentric (ECC) phase of the movement increases both muscle mass and strength ( 13,28,31,55 ), and the increases are magnified when combining CON and ECC actions ( 26,28,30 ). (lww.com)
The rope is conducted to do a traction motion when the corresponding handle, connected to the rope, is pulled by the hands with strength, the rope winds around the corresponding pulleys and drives the weighing unit to move up and down, and then the weighing unit is slowly placed down, so that the purpose of training such muscles as quadriceps femoris, latissimus dorsi, musculus biceps brachii and the like. (google.com)
Basic fitness is a mix of four things: cardiovascular endurance, muscle strength, muscle endurance, and flexibility. (wikihow.com)
High-load resistance exercise contributes to maintenance of muscle mass, muscle protein quality, and contractile function by stimulation of muscle protein synthesis (MPS), hypertrophy, and strength gains. (frontiersin.org)
These results demonstrate that BFRRE increases long-term muscle protein turnover, ribosomal biogenesis, and muscle strength to a similar degree as HLRE. (frontiersin.org)
Isokinetic Strength Characteristics of the Quadriceps Femoris and Hamstring Muscles in High School Students. (scirp.org)
My work within elite sport has been understanding the role of muscle mass and strength, muscle mass distribution and muscle architecture for performance and injury risk. (shu.ac.uk)
I also share exciting news with you that I'm sure will motivate you: age doesn't matter when it comes to increasing muscle strength. (saveourbones.com)
When performing any sort of strength training exercise, you want to make sure that you take at least 48 hours of rest between each major muscle group. (askmen.com)
Squat is a dynamic strength training movement that requires the muscles of your upper and lower body to work together at the same time. (fitnessprogramer.com)
Soft tissue changes around the knee joint can lead to decrease in strength of the quadriceps muscles and sagital range of motion, which may further lead to increased soft tissue contracture 10 . (edu.pk)
To describe a kinesiologic EMG method and determine the reliability of EMG activity of representative muscles of mastication (temporal, masseter), posture of neck (sternocleidomastoid, trapezius) and trunk (rectus abdominis, paravertebral), and lower extremity strength (rectus femoris, medial gastrocnemius) during simulation of activities of daily living. (bvsalud.org)

The quadriceps are a large group of muscles located on the front of the thighs. (livestrong.com)
The hamstrings, at the back of your thighs, are another of the major muscle groups used when cycling, and they do so in close coordination with quadriceps muscles. (livescience.com)
It helps to strengthen the muscles around the calf and thighs, improves mobility around the joints, and also reduces stress levels. (healthguide.ng)
These are the large muscles on the front of your thighs. (balletcentredubai.com)
The primary focus is on the muscles located on the front of the thighs when performing this movement and it's a fantastic exercise to include in your CrossFit WODs (workout of the day). (gymguider.com)
The hamstrings, the muscles in the back of your thighs, running from the hips to the knees and actually cross the knees. (healthykneesclub.com)

The quadriceps femoris is a group of muscles located in the front of the thigh. (healthline.com)

This is thought to be linked due to the muscle imbalance in your quadriceps and glute muscles which may create an increase in patellofemoral pain syndrome symptoms over time leading to patella issues down the road. (physicaltherapyproductreviews.com)
The action of the patella helps guide the movement of the muscles in the lower leg called the quadriceps. (petinsurancequotes.com)
Some dogs may shake or hold up their affected leg to lengthen the quadriceps, which helps the patella return to the correct anatomical position. (petinsurancequotes.com)
Therapy zeroing in on delicate tissue preparation and extending the quadriceps muscle assists with lessening the draw on the patella ligament and decrease the pain related with the condition. (rontarverphotographs.com)
The extensor component, which incorporates the quadriceps muscles, the patella and patella ligament, associates the quadriceps muscles to the patella kneecap and afterward on to the tibia shin through the patella ligament. (rontarverphotographs.com)
However, if the pull produced by the medial and lateral sides of the quadriceps femoris muscle is not properly balanced, abnormal tracking of the patella toward the lateral side may occur. (momentumclubs.org)

Muscle twitching (fasciculations) occurs when anterior horn cells or proximal roots are involved. (medscape.com)

Results: Withthe helpof givenkeywords,abstracts/articlesof 21studieswereretrievedfromthedatabase.After initial screening oftheabstracts12studieswereselectedforindepthanalysis.Variouslowerextremity musclesincludingTibialisAnterior,Soleus,Quadriceps,Vastusmedialis,GluteusMaximus were investigatedinthe studies.In2studies,Trunkmuscleswereinvestigatedwhereasinone study Tricepsmuscleactivity wasanalyzedduring Sit-toStandactivity inpatientswith stroke. (who.int)
Conclusion:Fromthisstudy itcanbecon-cludedthattheactivityofTibialisAnterior musclewasinvestigatedmorefrequentlybyvariousresearchersfollowedbytheactivityof Soleus and Quadriceps muscle. (who.int)
Bend your back knee a bit to change the focus of the stretch to the soleus muscle. (healthykneesclub.com)

Adductor Magnus is the largest groin muscle and is one of the two long adductor muscles (gracilis is the other). (sportsinjuryclinic.net)
Adductor Longus is the middle of the three short adductor muscles. (sportsinjuryclinic.net)
Groin strains are common injuries to the adductor muscles, which occur without a thorough warm-up or in individuals with chronically tight or weak adductor muscles. (sportsinjuryclinic.net)

This is an excellent exercise for anyone wishing to boost their overall health, strengthen their muscles, and increase bone density - and it doesn't matter what your age is. (saveourbones.com)
Push-ups help to strengthen the muscles around the back, chest, and shoulders. (healthguide.ng)

8, 9 Poor peripheral muscle endurance is clinically relevant because it is associated with poor functional status 7 and exercise intolerance in patients with COPD. (bmj.com)
Stimulating protein turnover during ageing and disease may therefore be important for preserving a functional muscle mass. (frontiersin.org)
These muscle groups have been described as having different contributions at different phases of the pedal cycle, and different muscles within these groups can also be assumed to have different functional contributions. (livescience.com)
17 Fisher NM, Pendergast DR, Gresham GE, Calkin E. Muscle rehabilitation: its effect on muscular and functional performance of patients with knee osteoarthritis . (thieme-connect.com)

Needle biopsies of the quadriceps were performed in 16 subjects in both groups to evaluate possible relationships between T f and markers of muscle oxidative metabolism (type I fibre proportion and citrate synthase activity). (bmj.com)
Muscle biopsies were also collected in the immediate hours following single-bout exercise to assess signaling for muscle protein degradation. (frontiersin.org)

By extending completely and locking out your knees, you are giving your muscles time to relax before the next repetition, and more importantly, you are transferring the tension from the quadriceps to the knee joints which is something you definitely want to avoid. (gymguider.com)

Based on previously reported changes in muscle metabolism that could increase susceptibility to fatigue, we speculated that patients with chronic obstructive pulmonary disease (COPD) have reduced quadriceps endurance and that this will be correlated with the proportion of type I muscle fibres and with the activity of oxidative enzymes. (bmj.com)
The electrical activity of the quadriceps was recorded during muscle contraction as an objective index of fatigue. (bmj.com)
Subjects in both groups had evidence of electrical muscle fatigue at the end of the endurance test. (bmj.com)
Although earlier studies yielded conflicting results, 6, 7 it is becoming generally accepted that lower limb muscle endurance is reduced and susceptibility to fatigue is greater in patients with COPD than in healthy subjects of similar age. (bmj.com)
Electromagnetic acupuncture to enhance the effects of manual acupuncture on recovery from muscle fatigue of the quadriceps. (docksci.com)
Thus, we confirmed that compared with manual acupuncture, EMA resulted in better recovery from muscle fatigue. (docksci.com)
In order to conduct fundamental research for observing the usefulness of EMA in comparison to manual acupuncture, we developed an eight-channel EMA system and performed a muscle fatigue recovery experiment. (docksci.com)
MCS Run Compression Tights with revolutionary muscle containment stamping are developed with a detailed understanding of the impact running has on the legs, reducing muscle movement, damage and fatigue for your best run ever. (2xu.com)
Previous studies have tried this sort of thing, and have sometimes concluded that caffeine doesn't make any difference in muscle function or fatigue. (outsideonline.com)
Eleven months after she began taking obinutuzumab, the patient sought treatment for 4 weeks of fatigue, myalgias, muscle tenderness, and leg edema without fever. (cdc.gov)
A charley horse can be caused by a direct blow or sudden stretch of the muscle, but most of the time they're caused by strain or fatigue during exercise. (skipperwbreeders.com)

Ingham SA, van Someren KA, Howatson G. Effect of a concentric warm-up exercise on eccentrically induced soreness and loss of function of the elbow flexor muscles. (edu.pl)
Flexor carpi radialis is the first muscle medial to your finger at the level of the apex of the antecubital fossa (where brachioradialis and the muscle converge) and is superficial at that point. (medscape.com)

He says this break time allows the muscles to repair and minimizes the risk of overuse injuries. (askmen.com)

Quantitative analysis of quadriceps muscle biopsy. (elsevier.com)
Quadriceps muscle biopsy was performed in 7 definite and 45 possible carriers of Duchenne muscular dystrophy. (elsevier.com)
The detection rate of combined serum CK determination and histometric analysis of muscle biopsy was: 100% in definite carriers, 65% in mothers possible carriers, 38% in sisters and 25% in the group of cousins and aunts. (elsevier.com)
The results indicate that quantitative analysis of muscle biopsy may be used to detect some possible carriers with normal serum CK. (elsevier.com)
in fact the detection rate of histometric analysis of muscle biopsy decreased by increasing the number of controls, resulting much lower than previously reported. (elsevier.com)
Dive into the research topics of 'Quantitative analysis of quadriceps muscle biopsy. (elsevier.com)
Muscle histopathologic findings from a biopsy of the quadriceps showed features of an inflammatory myopathy (interstitial edema, perivascular lymphocytic cuffing, and degenerating fibers) consistent with the features of early dermatomyositis. (cdc.gov)
Please contact us if you are unable to decide on which muscle to biopsy before beginning biopsy and we will try to assist you. (cuanschutz.edu)
Relative contraindications to having a muscle biopsy include patients with a bleeding diathesis or receiving anticoagulation are best assessed by the surgeon performing the procedure. (cuanschutz.edu)
Please submit two (2) 5-10 mm diameter of the muscle biopsy if possible. (cuanschutz.edu)
Place muscle biopsy in moist gauze and put it in a specimen cup. (cuanschutz.edu)
Relative contraindications to having a muscle biopsy such as a hypocoagulable state are best assessed by the surgeon performing the procedure. (cuanschutz.edu)

When we lift weights (or any heavy object for that matter) that stress the musculoskeletal system, we create tiny microscopic tears in the affected muscle tissue. (alive.com)
Reverse transcription PCR of the muscle tissue indicated enterovirus RNA. (cdc.gov)
When anesthetizing the skin and subcutaneous tissue, do not infiltrate the muscle with the anesthetic, this causes artifacts. (cuanschutz.edu)

However, it can also affect people who engage in other physical activities or those who have certain risk factors such as malalignment, overpronation, flat feet, and weak quadriceps muscle. (lustrengththerapy.com)
Identify a muscle which is mildly to moderately weak (MRC grade 4- to 4+) since weaker muscle often only show nonspecific end stage changes. (cuanschutz.edu)

Strong legs and core muscles help snowboarders jump and turn to avoid obstacles, plus remain standing upright when their balance is challenged. (exercise.com)

While Squat helps to develop leg muscles, it also supports muscle building throughout the body. (fitnessprogramer.com)
Other secondary muscles that are engaged during this exercise include the hamstrings (to a lessor extent when compared to a traditional barbell squat), the lower back and the shoulders (to hold the barbell in position during the exercise). (gymguider.com)

If the full range of motion is not reached, the muscles will not be properly engaged and optimal growth will not occur. (gymguider.com)
Dynamic stretching means when you move a joint or muscles through its full range of motion. (himalayanyogaashram.com)

Semimembranosus is the most medial of the three hamstring muscles. (sportsinjuryclinic.net)

What Causes Quad Muscle Pain? (livestrong.com)
Dec 2008-- A preliminary study, funded by the McCormick Science Institute, found that an acute oral dose of 2 grams of ginger did not have a significant effect on muscle pain during exercise in college students. (mccormickscienceinstitute.com)
A follow up study is investigating whether longer-term oral administration of ginger prior to exercise can affect muscle pain and inflammation 24 and 48 hours after exercise is completed. (mccormickscienceinstitute.com)
The effects of an oral dose of ginger on quadriceps muscle pain, rating of perceived exertion (RPE), and recovery of oxygen consumption were examined during and after moderate intensity cycling exercise. (mccormickscienceinstitute.com)
Quadriceps muscle pain, RPE, work rate, heart rate (HR), and oxygen uptake (VO2) were recorded every 5 min during exercise, and HR and VO2 were recorded for 20 min after exercise. (mccormickscienceinstitute.com)
Compared with placebo, ginger had no clinically meaningful or statistically significant effect on perceptions of muscle pain, RPE, work rate, HR, or VO2 during exercise. (mccormickscienceinstitute.com)
Pressure pain threshold at the central muscle belly was significantly reduced for the control group on both day 2and 3 (p≤0.003) but not for the warm-up group (p≥0.21). (edu.pl)
For the cool-down group, pressure pain threshold at thecentral muscle belly was significantly reduced on day 2 (p≤0.005) and was also lower compared to the warm-up group(p=0.025). (edu.pl)
Pressure pain tolerance at different sites on the quadriceps femoris prior to and following eccentric exercise. (edu.pl)
Tricompartment offloader knee brace reduces sagittal plane knee moments, quadriceps muscle activity, and pain during chair rise and lower in individuals with knee osteoarthritis. (bvsalud.org)
This study aimed to determine the effect of the TCO brace on sagittal plane knee moments, quadriceps muscle activity, and pain in individuals with multicompartment knee OA. (bvsalud.org)
With more than 300 individual joints in the human body, pain and dysfunction in the tissues and muscles surrounding those joints is a common problem. (amtamassage.org)
If the contracting muscles don't relax for several seconds or more, the pain can be severe. (skipperwbreeders.com)
Tammy was able to perform manual therapy to alleviate pain and muscle spasms and allow her to move much more easily and normally. (thek9bodyshop.com)
In March 2021, a 45-year-old male kidney transplant recipient in China was admitted to the hospital for a 2-month history of muscle pain. (cdc.gov)

Well-functioning quadriceps plays an important role in strengthening the knee joint. (livestrong.com)
When these muscles begin to atrophy, or decrease in size, problems in the knee joint may arise. (livestrong.com)
Individuals who work at sedentary jobs, wear a leg cast or brace that prevents movement in the knee joint or are bedridden are at very high risk for atrophy of the quadriceps. (livestrong.com)

Those with medical conditions such as stroke and arthritis and have limited mobility may also experience muscle wasting. (livestrong.com)
The study, cited by the European Journal of Applied Physiology (opens in new tab) , found that the peak activation point for the two vastii muscles is 80.8°, so just less than halfway through the propulsion part of the pedal stroke. (livescience.com)
At least one study, in the Scandinavian Journal of Rehabilitation Medicine (opens in new tab) , has found that being attached to the pedals changes the way the rectus femoris is activated: A study in the journal found that that muscle was activated 20° earlier in the pedal stroke when riders used toe clips. (livescience.com)
The European Journal of Applied Physiology study, which assessed muscle use at different points in the pedal stroke, concluded that "During pedaling, an optimization of quadriceps and hamstring muscle recruitment is desirable for producing power at the pedal. (livescience.com)
Unsurprisingly, the hamstring muscles are mostly activated during the later stage of the pedal stroke. (livescience.com)

correlation between foot arch index and quadriceps angle among patients with knee osteoarthritis in national orthopaedics hospital enugu. (academicjournals.org)

Examination of the Reproducibility of Grip Force and Muscle Oxygenation Kinetics on Maximal Repeated Rhythmic Grip Exertion. (scirp.org)

The Tensor Fasciae Latae (TFL) is a small muscle on the outside of the hip. (sportsinjuryclinic.net)
In order to allow the pelvis to shift laterally over the standing leg , which enables you to keep your balance and your pelvis level, the g luteus medius and minimus , the piriformis , and other pelvic muscles as well as the tensor fasciae latae in the thigh contract eccentrically. (tintyoga.com)

The piriformis muscle lies beneath your gluteus muscles and connects your lower spine to the upper part of your leg. (manhattanorthopedic.com)
So are the gluteus muscles, the piriformis and other pelvic muscles to allow for the leg to externally rotate and open to the side. (tintyoga.com)

Before and after the rides, they were wired up with a bunch of electrodes and other equipment to assess the function of their brains, central nervous systems, muscles, and circulatory systems. (outsideonline.com)
For each test (TC, TB, and TW) the intraclass correlation coefficient (ICC) and 95% confidence interval were estimated stratified by muscle, presence or not of complete dentures, and movement during the test (up and down) considering the three repetitions per subject to assess consistency. (bvsalud.org)

The outcome measurement is the peak force (Newton) of the quadriceps at one speed (60 degrees/second). (cdc.gov)

Biceps Femoris is one of the three muscles which form the hamstring group forming the back of the thigh. (sportsinjuryclinic.net)
Back then, most people thought that caffeine was simply a stimulant, or that it enhanced fat-burning to give muscles more energy. (outsideonline.com)
Second, as Terry Graham told me back in 2008, caffeine did seem to help the muscles themselves. (outsideonline.com)
For stability and balance, engage your core and buttock muscles of your back leg. (cnn.com)
Let's start by taking a look at the muscles targeted by The Whole Leg And Back Strengthener. (saveourbones.com)
This group of muscles is absolutely crucial for posture and vertebral density - they are involved in back extension, proper curvature of the spine, and holding the spine in an erect, upright position. (saveourbones.com)
The hamstrings are also part of the muscles in your upper leg, but the hamstrings are in the back. (saveourbones.com)
This is the large muscle on the back of your lower leg. (balletcentredubai.com)
This is a large muscle that runs from your lower back to your hip. (balletcentredubai.com)
This is a large muscle on the back. (balletcentredubai.com)
If you have a tight hamstring behind your knee or a tight calf muscle , chances are, you'll feel some discomfort in the back of the knee. (healthykneesclub.com)

The erector spinae are a serious of three muscle strips that run from the base of your skull to your pelvis, attaching at various vertebrae and ribs along the way. (saveourbones.com)
The rotator muscles of the lifted leg try to counteract this by stabilizing the pelvis. (tintyoga.com)

In individuals who underwent unilateral TFA, hip girdle muscle imbalance in the involved limbs may be associated with oxygen consumption rate while using a prosthesis. (e-arm.org)

You'll be able to consider weight machines if you wish to exercise particular teams of muscle groups which incorporates the biceps, deltoids, and quadriceps in a safer approach. (besthealthierlife.com)

Atrophy of the quadriceps muscles can occur for a variety of reasons, one of which is lack of activity or exercise of the muscles. (livestrong.com)
Peripheral muscle dysfunction contributes to exercise intolerance in patients with chronic obstructive pulmonary disease (COPD). (bmj.com)
The aim of the present study was to investigate the effect of warm-up and cool-down exercise on delayed onsetof muscle soreness at the distal and central parts of rectus femoris following leg resistance exercise. (edu.pl)
This study indicates that aerobicwarm-up exercise performed prior to resistance exercise may prevent muscle soreness at the central but not distalmuscle regions, but it does not prevent loss of muscle force. (edu.pl)
Effects of warm-up before eccentric exercise on indirect markers of muscle damage. (edu.pl)
The increase in muscle mass appears was not influenced by the existence of eccentric overload during the exercise. (lww.com)
Today's exercise focuses on muscles that you may not have considered important for better posture and balance. (saveourbones.com)
A recent German study scientifically proves that muscles respond positively to exercise at any age. (saveourbones.com)
That's why, as I mentioned earlier, today's exercise involves muscles you may not have considered when it comes to bone health and posture. (saveourbones.com)
Here's what Castrogaleas has to say: "When we perform a physical activity or exercise, we break down muscle. (askmen.com)
If you are looking for a way to build your abdominal muscles with ease, then sit-up is the exercise you need to try. (healthguide.ng)
However, as you are performing this exercise, there are additional muscles that help in the general movement and these are referred to as "synergistic" or "secondary" muscles. (gymguider.com)
They are done to loosen the muscles post exercise. (himalayanyogaashram.com)
This helps in getting your cold muscles get ready for exercise. (himalayanyogaashram.com)

Excruciating spasms of the leg muscles may also occur in some individuals when the motor fibers (described in the next section) are affected. (spine-health.com)

Surgery is also indicated for most chronic complete quadriceps ruptures. (medscape.com)

Quadriceps angle in children with and without pes planus. (academicjournals.org)
Studies have found activation of the semimembranosus and semitendinosus - two of the three hamstring muscles - at between 150° and 270° crank angle. (livescience.com)

Rolando Lopez, PA-C, a physician assistant at The Orthopaedic & Sports Medicine Center in Trumbull, Connecticut, said the majority of patients he sees experience muscle spasms related to their injury or disorder. (amtamassage.org)
Periarticular injections, unlike femoral nerve blocks, allow patients to maintain control of the quadriceps muscles. (news-medical.net)
The tenants of osteopathic medicine tell us that function follows form, so enabling the quadriceps to fully engage helps patients to get up and begin walking independently faster,' Dr. Horn explained. (news-medical.net)
These therapies also play an important role in muscle strengthening, to keep the patients mobile and active. (edu.pk)
Especially for arthritis patients who find their muscles sore and inactive in the morning, they can do ankle circles, neck circles and other such stretches recommended to them by their physiotherapist. (himalayanyogaashram.com)
To evaluate the relationship between femoral muscle volume (FMV) and physiological outcomes after trans-femoral amputations (TFAs) affecting overall locomotor function in patients. (e-arm.org)

Injury or disease of the femoral nerve, the nerve that innervates the quadriceps, results in a more severe type of atrophy. (livestrong.com)
The threshold current for an elicited motor response (QC or sartorius muscle contraction [SC]) was recorded during needle insertion, after femoral nerve catheter advancement, and prior to local anesthetic administration on the first postoperative day. (dovepress.com)
We hypothesized that a post-amputation decrease in femoral muscles' volume of the involved limb may affect clinical functions, such as gait and balance, in a person with TFA. (e-arm.org)

Anatomy39

Organisms1

Diseases13

Chemicals and Drugs7

Analytical, Diagnostic and Therapeutic Techniques and Equipment20

Psychiatry and Psychology2

Phenomena and Processes28

Anthropology, Education, Sociology and Social Phenomena6

Health Care3

Effect of regular Tai Chi and jogging exercise on neuromuscular reaction in older people. (1/588)

Skeletal muscle mitochondrial DNA content in exercising humans. (2/588)

Effect of carbohydrate ingestion on exercise-induced alterations in metabolic gene expression. (3/588)

Changes in dysferlin, proteins from dystrophin glycoprotein complex, costameres, and cytoskeleton in human soleus and vastus lateralis muscles after a long-term bedrest with or without exercise. (4/588)

Quadriceps force generation in patients with osteoarthritis of the knee and asymptomatic participants during patellar tendon reflex reactions: an exploratory cross-sectional study. (5/588)

The relationship between ciliary neurotrophic factor (CNTF) genotype and motor unit physiology: preliminary studies. (6/588)

Therapeutic exercise for knee osteoarthritis: considering factors that may influence outcome. (7/588)

Maximal motor unit firing rates during isometric resistance training in men. (8/588)

Quadriceps Muscle

Thigh

Muscle, Skeletal

Muscles

Muscle Strength

Muscle Fatigue

Muscle Weakness

Muscle Contraction

Torque

Isometric Contraction

Knee

Knee Joint

Femoral Nerve

Muscle Proteins

Muscle Strength Dynamometer

Muscle Fibers, Skeletal

Electromyography

Electric Stimulation Therapy

Patella

Exercise

Muscle, Smooth

Leg

Muscular Atrophy

Anterior Cruciate Ligament

Biomechanical Phenomena

Knee Injuries

Muscular Diseases

Patellar Ligament

Muscle, Smooth, Vascular

Respiratory Muscles

Muscle Fibers, Slow-Twitch

Jogging

Muscle Development

Artificial Organs

Mitochondria, Muscle

Tendons

Immobilization

Physical Endurance

Electric Stimulation

Osteoarthritis, Knee

Patellofemoral Joint

Oxygen Consumption

Range of Motion, Articular

Myostatin

Weight Lifting

Joint Instability

Bicycling

Muscle Fibers, Fast-Twitch

Physical Exertion

Weight-Bearing

Exercise Test

Gait

Patellofemoral Pain Syndrome

Arthroplasty, Replacement, Knee

Muscle Denervation

Exercise Therapy

Recovery of Function

Pulmonary Disease, Chronic Obstructive

Time Factors

Motor Neurons

Abdominal Muscles

Myocytes, Smooth Muscle

Muscle Spindles

Lactic Acid

Adaptation, Physiological

Paraplegia

Biopsy

Muscle Relaxation

Hypertrophy

Neck Muscles

Oculomotor Muscles

Glycogen

Regional Blood Flow

Muscle, Striated

Analysis of Variance

Organ Size

Femur

Papillary Muscles

Pain Measurement

Motor Activity