AnatomyOrganismsDiseasesChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPsychiatry and PsychologyPhenomena and ProcessesAnthropology, Education, Sociology and Social PhenomenaHealth Care
Quadriceps MuscleMusclesMuscle, SkeletalThighMuscle FatigueMuscle ContractionMuscle ProteinsMuscle WeaknessMuscle StrengthMuscle Fibers, SkeletalMuscle, SmoothIsometric ContractionTorqueMuscle, Smooth, VascularKneeKnee JointElectromyographyFemoral NerveMuscle DevelopmentMuscle Strength DynamometerMuscle Fibers, Slow-TwitchMuscular AtrophyElectric Stimulation TherapyRespiratory MusclesMitochondria, MuscleExercisePatellaMuscular DiseasesLegMuscle Fibers, Fast-TwitchBiomechanical PhenomenaMuscle DenervationAnterior Cruciate LigamentKnee InjuriesPatellar LigamentMyocytes, Smooth MuscleElectric StimulationTendonsJoggingMuscle SpindlesPhysical EnduranceNeck MusclesOculomotor MusclesImmobilizationMuscle RelaxationArtificial OrgansAbdominal MusclesMuscle, StriatedMyostatinOxygen ConsumptionPhysical ExertionPapillary MusclesOsteoarthritis, KneeWeight LiftingPatellofemoral JointWeight-BearingBicyclingRange of Motion, ArticularTime FactorsJoint InstabilityMuscle CellsMotor NeuronsExercise TestGaitMasseter MuscleFacial MusclesMasticatory MusclesIntercostal MusclesGlycogenPatellofemoral Pain SyndromeExercise TherapyAdaptation, PhysiologicalArthroplasty, Replacement, KneeHypertrophyLactic AcidPulmonary Disease, Chronic ObstructiveSatellite Cells, Skeletal MuscleRecovery of FunctionBiopsyPectoralis MusclesRegional Blood FlowHindlimbOrgan SizeAnalysis of VarianceMyofibrilsParaplegiaAgingDiaphragmMyosin Heavy ChainsPsoas MusclesTemporal MuscleMotor ActivityRabbitsFemurPain MeasurementPainCells, CulturedCalciumMice, Inbred C57BLNeuromuscular Junction
HamstringsTypes of quadricepsPatellarFemoris muscleCalf musclesTendonFlexionWeakContractionIsometricGaitExercisesStiffnessStrainsShearInjuriesPelvicKnee jointPatellofemoralBendContusionFlexorCommonlyNeuromuscularTibiaUpperCore musclesTransverse abdominisThigh musclesErector spinaeStrengthenLigamentsTrapeziusPelvisAbdominalSkeletal muscleMaximalAtrophyStretchKneesPatientsRectus FemorisActivityMechanicalAgonistWeakness associatedIncreasesRuptureTightenStrongerInjuryExtensionExtendsPartialSignificantlyBackAthletesCommonLengthHigher
Hamstrings1
Types of quadriceps2
  • Several types of quadriceps injuries can occur, the most common being the quadriceps contusion, which is painful and disabling. (medscape.com)
  • Other types of quadriceps injuries include strains of the quadriceps tendon, complete and partial tears of the quadriceps tendon, and fascial rupture of the quadriceps muscle. (medscape.com)
Patellar4
  • The incidence of jumper's knee at the quadriceps insertion onto the patella is less common than patellar tendinitis. (medscape.com)
  • The quadriceps and patellar tendons are sometimes called the extensor mechanism. (webmd.com)
  • Often, a neoprene brace can be helpful while exercising, to provide support to the quadriceps muscles and maintain normal patellar tracking. (everything2.com)
  • The extensor mechanism originates from the hip area, includes the quadriceps muscle, knee cap and patellar tendon, and attaches on the tibial crest. (acvs.org)
Femoris muscle1
  • In case, the Rectus Femoris muscle is tight the knee would extend. (docpods.com)
Calf muscles1
Tendon6
Flexion4
  • Subjects first performed a maximal isometric knee extension (IKE) and knee flexion (IKF) followed by the IS and muscle activity (EMG max ) was recorded for the vastus medialis (VMO), vastus lateralis (VL), semitendinosus (ST) and biceps femoris (BF). (jssm.org)
  • The slack angle was similar among the muscles: 41.3° ± 10.6° 44.3° ± 9.1° and 44.3° ± 5.6° of knee flexion for VMO, RF, and VL, respectively (p = 0.626). (edu.hk)
  • MViC and VA of quadriceps muscle, knee flexion and extension range of motion, pain level, along with a Timed Up-and-Go Test (TUG) and self-reported measure of physical function (assessed using the Oxford Knee Score questionnaire [OKS]) were evaluated before (PRE) and 1 month after surgery (POST). (omicsdi.org)
  • This exercise targets the inner and outer hamstring muscles at varying angles of flexion or knee bend. (sportsinjuryclinic.net)
Weak2
Contraction2
  • As the joint moves upon contraction of the quadriceps, "shear force" is created which places the knee joint in a compromising position for optimum safety. (nfpt.com)
  • The extension of the knee is essential for the gait to proceed further and it is done by the contraction of the Quadriceps Muscles. (hubpages.com)
Isometric3
  • The primary purpose of this investigation was to determine whether strength-matched men and women exhibit a different magnitude and ratio of leg muscle activity during a maximal voluntary isometric squat. (jssm.org)
  • This investigation indicates that the magnitude of muscle activity and the ratios examined are not significantly different between men and women in a maximal voluntary isometric squat when matched for normalized strength. (jssm.org)
  • This full-body isometric exercise is an excellent way to get all the muscle groups to work together in unison. (healthline.com)
Gait2
  • Conclusions Young athletes with PFPS showed increased length of quadriceps muscles activity and reduced functional knee Rom while walking, comparing with healthy subjects, in particular muscular onset was anticipated in respect of the loading response event of the gait. (unicatt.it)
  • This gait may be corrected by strengthening the Quadriceps Muscles or by using suitable Splints or Orthoses. (hubpages.com)
Exercises12
  • Once the pain and swelling start to improve, you should consider exercises to help your muscles regain their strength. (mskdiagnostics.co.uk)
  • Performing regular stretching and strengthening exercises could help avoid future episodes of quadriceps muscle injury. (mskdiagnostics.co.uk)
  • This study aimed to determine the squat exercises [general squat (GS), wall squat (WS), and Spanish squat (SS)] that effectively increased muscle activity using electromyography (EMG). (biomedcentral.com)
  • The Kruskal-Wallis H test was used to compare thigh muscle activities among the various squat exercises. (biomedcentral.com)
  • Squat exercises for improving quadriceps strength are said to be functional since they require more joint movement than other lower limb exercises, promoting functional muscle mobilization patterns [ 9 ]. (biomedcentral.com)
  • Quadriceps muscle activity during commonly used strength training exercises shortly after total knee arthroplasty: implications for home-based exercise-selection. (omicsdi.org)
  • Whether similar levels of neuromuscular activity of the muscles in the operated leg, elicited during strength training exercises in machines, can be reached during strength training exercises in more simple forms is unknown. (omicsdi.org)
  • Therefore, the purpose of this study was to determine which strength training exercises that activated the muscles in the operated leg the most after TKA. (omicsdi.org)
  • The hypothesis was that strength training exercises performed in machines would elicit higher levels of voluntary peak quadriceps and hamstring muscle activity than strength training exercises performed in more simple forms, using elastic bands or the patients' own body weight. (omicsdi.org)
  • METHODS:A cross-sectional electromyographic study investigated voluntary peak muscle activity in the operated leg during 6 different strength training exercises. (omicsdi.org)
  • The aim of the present study was to analyze the activation pattern of the serratus anterior (SA), upper trapezius (UT), and lower trapezius (LT) muscles during periscapular exercises in individuals with and without ED, and to identify which proposed exercise presents greater activation of the periscapular muscles. (researchgate.net)
  • Essential to staying strong and vital during older adulthood is participa- tion in regular strengthening exercises, which help to prevent osteoporosis and frailty by stimulating the growth of muscle and bone. (cdc.gov)
Stiffness3
  • Stiffness of Quadriceps is usually associated with the problems of Patello-femoral joint and requires proper stretching. (docpods.com)
  • Muscle shear modulus (an index of muscle stiffness) measured using ultrasound shear wave elastography can be used to estimate changes in stiffness of an individual muscle. (edu.hk)
  • Further research is needed to determine whether changes in muscle stiffness are muscle-specific in pathological conditions or after interventions such as stretching protocols. (edu.hk)
Strains5
  • With a good rehabilitation/exercise regime, you can usually recover from Grade 1 and 2 muscle strains, as well as the majority of contusion injuries, within several weeks. (mskdiagnostics.co.uk)
  • Other quadriceps injuries range from simple strains to more complex and disabling muscle ruptures. (medscape.com)
  • Although quadriceps strains are common, minimal information about the frequency with respect to specific sports is available. (medscape.com)
  • Almost 78% of quadriceps strains were sustained during practice, however, the rate was higher during competition than during practice (approximately 1.3 versus 1.0/10 000 Athlete-exposures). (medscape.com)
  • Overall, women had a higher rate of quadriceps strains than men. (medscape.com)
Shear2
  • The shear modulus of VMO, RF, and VL muscles was measured while the quadriceps was passively stretched at 3°/s. (edu.hk)
  • The relationship between the muscle shear modulus and knee angle was plotted as shear modulus-knee angle curve through which the slack angle of each muscle was determined. (edu.hk)
Injuries11
Pelvic4
  • These are the corset-like muscles that wrap around the midline to the spine, the pelvic floor muscles, and the abdominal and lower back muscles. (healthline.com)
  • A layer of connective tissue called the fascia connects the muscles of the abdominals to the pelvic floor and helps them work together for optimal performance. (healthline.com)
  • Contract the muscles of the pelvic floor. (healthline.com)
  • Limb-girdle muscular dystrophy (LGMD) refers to a group of disorders that manifest as weakness and wasting of arm and leg muscles, with muscles of the shoulders, upper arms, pelvic area, and thighs being most frequently involved. (medscape.com)
Knee joint2
Patellofemoral3
  • Although WS with Swiss ball is often used to facilitate greater muscle activation [ 17 ], the location of the wall and feet altered biomechanical force on the patellofemoral joint which could potentially results in increasing patellofemoral force and reducing the effect of exercise [ 18 ]. (biomedcentral.com)
  • Purpose The purpose of the study was to evaluate if during a common activity as walking, altered quadriceps muscular activity may be present in patellofemoral pain syndrome (PFPS) patients. (unicatt.it)
  • Patellofemoral pain (PFP) may contribute to less activation of the quadriceps muscle, favoring joint overload and pain. (researchgate.net)
Bend2
  • To get the inside of the quadriceps muscles at the vastus medialis head, bend your right knee and place your right foot on your left ankle. (personalpowertraining.net)
  • You have to squeeze your right quadriceps, bend the left knee and heel up towards your bottom. (snippets.com)
Contusion3
  • Muscle contusion (bruising) from a direct impact. (mskdiagnostics.co.uk)
  • The usual cause of the quadriceps contusion is a direct blow to the anterior thigh from an object or another person (eg, helmet, knee). (medscape.com)
  • Modified treatment of quadriceps contusion. (medscape.com)
Flexor3
  • The quadriceps femoris acts as a hip flexor and knee extender. (medscape.com)
  • identified and flexor muscle necrosis sidered when slowly growing soft tissue and fibrosis were noted (Figure 3). (who.int)
  • Figure 3 Mass incision showing many daughter vesicles, pus and flexor muscle necrosis cysts, especially in fat suppressed T2 weighted images [4]. (who.int)
Commonly4
  • The rectus femoris is the most commonly injured portion of the muscle because of its anterior location. (medscape.com)
  • The partial tear of the quadriceps most commonly affects the indirect (distal) head of the rectus femoris. (medscape.com)
  • Muscle imbalances- This is most commonly seen when the muscles on the outside of the leg are stronger than those on the inside . (everything2.com)
  • This is more commonly seen in women , as their wider pelvis causes their thigh muscles to lean loward their knees at a wider angle than those of men . (everything2.com)
Neuromuscular2
  • Neuromuscular efficiency (NME) is a variable that evaluates the relationship between the amount of neural stimuli and the ability to generate force of in a given muscle, with the most efficient being the one that produces greater. (researchgate.net)
  • Advances in molecular genetics have help in the discovery of significant information on the relationship between muscle biology and clinical neuromuscular diseases. (medscape.com)
Tibia1
  • During the performance of a leg extension, the quadriceps reacts by pulling the tibia forward. (nfpt.com)
Upper1
  • In addition to these abdominal muscles, planks activate other muscles of the core such as the erector spinae in the lower back, the serratus anterior in the upper back, the latissimus doors, and the glutes. (livescience.com)
Core muscles6
  • The core muscles of the lower back and abdominals also are engaged to stabilize the torso. (livestrong.com)
  • Keep your core muscles taut, your shoulders back and head up to help maintain a straight back. (livestrong.com)
  • Inhale and tighten the core muscles of your abdominals and lower back. (livestrong.com)
  • Exhale, tighten your core muscles to maintain the integrity of your posture, and push up from your heels to return to a standing position. (livestrong.com)
  • Any break in your concentration may cause you to relax your core muscles and round your back. (livestrong.com)
  • It also helps retrain the core muscles to work together during daily activities. (healthline.com)
Transverse abdominis3
  • Kehoe says that the primary muscles activated during the plank exercise are those that make up the core , such as the transverse abdominis, the rectus abdominis, and the internal and external obliques. (livescience.com)
  • The transverse abdominis is our deepest core muscle. (livescience.com)
  • Some key muscles that require retraining after pregnancy include the transverse abdominis. (healthline.com)
Thigh muscles1
Erector spinae1
Strengthen2
Ligaments1
  • While the knee is the largest joint in the human body, and is subject to gigantic amounts of stress , it relies almost entirely on soft tissue (i.e. ligaments , muscles , tendons ) for support. (everything2.com)
Trapezius1
Pelvis2
  • This muscle acts as a corset and attaches to our pelvis then wrapping around our front to the lumbar spine. (livescience.com)
  • [ 11 ] Walton and Nattrass described the disease as a progressive muscle weakness with atrophy involving predominantly proximal muscles (eg, pelvis, shoulder). (medscape.com)
Abdominal2
Skeletal muscle3
  • Hypokalemic periodic paralysis (HypoPP) is an ion channelopathy of skeletal muscle characterized by attacks of muscle weakness associated with low serum K + . HypoPP results from a transient failure of muscle fiber excitability. (jci.org)
  • Duchenne, a French physician, initially described a condition of progressive lethal wasting of degenerative skeletal muscle, which was later referred to as Duchenne muscular dystrophy. (medscape.com)
  • Skeletal muscle consists of 2 major components: the sarcolemma and the sarcomeres. (medscape.com)
Maximal1
  • Effect of a standardized, submaximal fatigue protocol on the maximal power output of the quadriceps muscles in college-aged females. (cdc.gov)
Atrophy2
  • The study shows the course of muscle atrophy and reduced peripheral circulation following SCI and shows that muscle thickness and limb blood flow returned to normal values after training. (odstockmedical.com)
  • [ 5 ] Erb's patient had only shoulder-girdle weakness and atrophy, with sparing of other muscles of the body and a benign disease course compared with that described by Duchenne in the 1860s. (medscape.com)
Stretch1
Knees1
Patients3
  • BACKGROUND:In the early phase after a total knee arthroplasty (TKA), patients experience multi-level weakness in the operated leg, which is caused primarily by reduced central nervous system (CNS) activation failure of the muscles - especially the knee extensors (quadriceps muscle). (omicsdi.org)
  • Therefore, this study explored whether the addition of motor imagery to routine physical therapy reduces the deterioration of quadriceps muscle strength and voluntary activation (VA) as well as other variables related to motor performance in patients after total knee arthroplasty (TKA). (omicsdi.org)
  • Several studies show that the mean age of patients with quadriceps rupture is about 65 years. (medscape.com)
Rectus Femoris1
  • Major hip flexors include Psoas Major, Iliacus, Tensor Fascia Lata, Rectus Femoris and Sartorius Muscle. (docpods.com)
Activity7
  • Muscle activity during the IS was expressed relative to the maximums observed during the IKE and IKF (%EMG max ). (jssm.org)
  • Agonist/Antagonist and medial/lateral muscle activity is not different between men and women when they are strength matched. (jssm.org)
  • 2014 ). Imbalances in ratio or magnitude of muscle activity are suggested to result in poor performance in physical activities and potentially increase risk of injury, particularly in women (Hewett et al. (jssm.org)
  • 2005 ). Prior evidence suggests that women have a greater imbalance in medial to lateral leg muscle activity (Myer et al. (jssm.org)
  • 2005 ), agonist to antagonist muscle activity in comparison to males during dynamic tasks (Ebben, 2009 ), and greater disproportional hamstring to quadriceps muscle activity ratios than men (Harput et al. (jssm.org)
  • Wireless surface EMG probes were used to evaluate quadriceps muscles activity. (unicatt.it)
  • Voluntary peak muscle activity (%EMGmax) was calculated for the quadriceps and hamstring muscles for each exercise. (omicsdi.org)
Mechanical1
  • Conclusion: This is the first study to experimentally determine the muscle mechanical behavior of individual heads of the quadriceps during passive stretching. (edu.hk)
Agonist1
  • During GS, the antagonistic muscles may have a significant influence on the stability of the weakened joints due to the agonist muscle co-activation [ 10 ]. (biomedcentral.com)
Weakness associated2
  • At that time, the differentiation between the spinal muscular atrophies and weakness associated with central nervous system disorders and primary muscle disease had not been established. (medscape.com)
  • Since the original descriptions of the condition, reports of many sporadic cases have been published with this pattern of muscle weakness associated with many other disorders. (medscape.com)
Increases1
Rupture2
Tighten3
Stronger1
Injury3
  • Returning to full fitness after a quadriceps muscle injury may take days, weeks or months, depending on how severe it is. (mskdiagnostics.co.uk)
  • The muscle is more resistant to injury if it is struck while in a contracted nonfatigued state. (medscape.com)
  • A study by Eckard et al that analyzed data from the NCAA Injury Surveillance Program from 2009 to 2015 found that the on quadriceps strain injury rate was 1.07/10 000 athlete-exposures. (medscape.com)
Extension3
  • The muscle is really a bunch of 3 muscles, the bicep femoris, the semitendinosis and also the semimembrinosis and are the work horses in the extension of the leg. (personalpowertraining.net)
  • The knee flexes to a maximum of 130-140 degrees, while the maximum range of hip extension is 10-30 degrees, however, the maximum movement is restricted by tightness in the Quadriceps. (docpods.com)
  • The leg extension strengthens the quadriceps muscle. (nfpt.com)
Extends1
Partial1
  • Grade 2: A partial muscle tear, which might cause swelling and bruising as well as some loss of strength. (mskdiagnostics.co.uk)
Significantly1
  • Furthermore, the VMO:VL and hamstring to quadriceps (H:Q) %EMG max ratio were not significantly different between groups in the IS (Men VMO:VL = 1.15 ± 0.28, Women VMO:VL = 1.22 ± 0.26, Men H:Q = 0.28 ± 0.14, Women H:Q = 0.24 ± 0.20). (jssm.org)
Back2
  • For the hamstring muscles, sit on the foam roller with the roller under the back of your thighs and your arms behind you with your hands on the floor for support. (personalpowertraining.net)
  • However, the hamstring muscles showed weaker muscle activation during GS because these muscles are biarticular structure [ 11 ] and some researches show that weight bearing back squat training does not provide a sufficient stimulus for hamstring muscles [ 12 , 13 ]. (biomedcentral.com)
Athletes1
Common1
  • Quadriceps muscle hernias are believed to be more common in soccer, basketball, and rugby. (medscape.com)
Length1
  • Because the quadriceps is in contact with the femur throughout its length, it is susceptible to compression forces. (medscape.com)
Higher1