• Amplitudes during the different intervals of stance were recorded and expressed as a percent of each muscle's maximum voluntary isometric contraction. (bepress.com)
  • Eighteen subjects were assigned to either an eccentric or concentric group and exercised for 30 minutes at 50% of isometric forearm maximum voluntary contraction. (cdc.gov)
  • They grasped the handle with a pronated grip, two cm below the umbilicus, and performed three isometric maximal voluntary contractions. (cdc.gov)
  • 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)
  • At 80° of elbow flexion, the moment arm and muscle thickness were determined at rest and during 60% of maximal voluntary contraction (60%MVC) of isometric elbow flexion. (humankinetics.com)
  • The purpose of this study was to examine the potential PAP effect of a hip abduction maximal voluntary isometric contraction (MVIC) on lumbar motion and power output during the barbell back squat. (aiac.org.au)
  • Training effects were compared between the Ab-Flex, Ab-Roller, and standard crunch exercise (the "control" condition) for EMG production, isometric peak voluntary contraction, and isokinetic peak torque at 30 deg/s. (sdsu.edu)
  • Voluntary activation level and muscle fiber recruitment of human quadriceps during lengthening contractions. (sharpweighingscale.com)
  • After the warm up, maximum voluntary isometric muscular strength of the elbow flexors and knee extensors were assessed using an electric dynamometer (EMG210C, EMGLAB System of Brazil). (wku.edu)
  • Comparison of Maximal Voluntary Isometric Contraction and Drachman's Hand-Held Dynamometry in Evaluating Patients with Amyotrophic Lateral Sclosis. (nih.gov)
  • Isometric exercises: On alternate days, 4-5 repetitions of 30 seconds with 1-2 minutes of rest between repetitions, progressively increasing the time up to 45 seconds, at 70% of their calculated maximum voluntary contraction using a dynamometer. (who.int)
  • Voluntary contraction of rhomboids, inferior trapezius, and serratus for shoulder stability, and deep flexors and extensors for the neck. (who.int)
  • 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)
  • Objective: To investigate the relationship between maximal isometric muscular contraction force and levels of CD4+ and CD8+ lymphocytes in sedentary, vertically transmitted HIV-1 positive adolescents. (wku.edu)
  • Main outcome parameters were maximal isometric plantar-flexion force (IPFF), electromyography (EMG)/force ratio, as well as jumping power and height. (galileo-training.com)
  • Protocols for isometric and eccentric contractions will be shown, as well as differences in results between dystrophic muscles, representing a pathological state, and wildtype muscles. (jove.com)
  • Activation of human quadriceps femoris during isometric, concentric, and eccentric contractions. (sharpweighingscale.com)
  • Some recent studies have also elected to examine Contraction velocity (Vc) as a change in Dm over time between 10% and 90% of the contraction. (wikipedia.org)
  • Test-retest reliability of muscle fiber conduction velocity and fractal dimension of surface EMG during isometric contractions. (supsi.ch)
  • Maximum contraction velocity showed a similar relationship. (silverchair.com)
  • The force-velocity relationship was the traditional Hill curve hyperbola, but deviated from the hyperbolic shape in the region of maximum contraction force close to the isometric contraction. (silverchair.com)
  • Reproducibility of knee extensor and flexor contraction velocity in healthy men and women assessed using tensiomyography: A registered report. (plos.org)
  • Langen G, Lohr C, Ueberschär O, Behringer M (2022) Reproducibility of knee extensor and flexor contraction velocity in healthy men and women assessed using tensiomyography: A study protocol. (plos.org)
  • Therefore, a shorter Tc is commonly associated with a higher contraction velocity [ 8 - 11 ]. (plos.org)
  • Muscular fatigue causes a slowing of muscle contraction velocity, reversing as the muscle recovers from fatigue [ 21 - 24 ]. (plos.org)
  • The sensor contains a tip designed to register muscle's contraction. (wikipedia.org)
  • It assesses skeletal muscle thickening and low frequency lateral oscillations of active skeletal muscle fibers during twitch contractions. (wikipedia.org)
  • Ryan TE, Brophy P, Lin CT, Hickner RC, Neufer PD (2014) Assessment of in vivo skeletal muscle mitochondrial respiratory capacity in humans by near-infrared spectroscopy: a comparison with in situ measurements. (mitophysiology.org)
  • The present study aimed to compare in vivo measurements of skeletal muscle mitochondrial respiratory capacity made using near-infrared spectroscopy (NIRS) with the current gold standard, namely in situ measurements of high-resolution respirometry performed in permeabilized muscle fibres prepared from muscle biopsies. (mitophysiology.org)
  • The highest isometric force and torque value were recorded and used for analyses. (wku.edu)
  • Isometric hip strength, but not quadriceps strength, was moderately lower on day 14 (P=0.08). (bmj.com)
  • Differential serial sarcomere quantity adaptations in knee extensor muscles of rats is contraction type dependent. (sharpweighingscale.com)
  • Algometry: to calculate the pressure pain threshold measurement of the common extensor carpi radialis, extensor carpi radialis brevis, and extensor carpi radialis longus muscles in both elbows, using the algometer (Wagner instruments, Greenwich, USA). (who.int)
  • The purpose of this study was to investigate how the contraction-induced increase in distal biceps brachii tendon moment arm is related to that in elbow flexor muscle thickness, with a specific emphasis on the influence of the site-related differences in muscle thickness. (humankinetics.com)
  • This result indicates that the contraction-induced increase in distal biceps brachii tendon moment arm is related to that in elbow flexor muscle thickness near the corresponding muscle-tendon junction. (humankinetics.com)
  • Goniometry: Measurement of elbow flexion, extension, and pronosupination using an universal goniometer. (who.int)
  • Muscular strength measurements were completed in the morning after blood collection and weight and height measurements. (wku.edu)
  • When biopsies were compared between the young and old participants, type II (fast twitch) fibers and to a lesser extent type I (slow twitch) fibers were smaller in the older participants, reducing the ability to produce strong muscular contractions [ 25 ]. (biomedcentral.com)
  • A tensiomyography measurement instrument includes an electrical stimulator and data acquisition subunit (1), a digital sensor (2), a tripod with manipulating hand (3), and muscle electrodes (4) that work with an essential software interface installed on a PC. (wikipedia.org)
  • Tensiomyography is a non-invasive, evidence-based measurement method that precisely measures the speed of muscle contraction under isometric conditions. (wikipedia.org)
  • A tensiomyography measurement consists of four steps: A special sensor is placed on the muscle to be measured. (wikipedia.org)
  • Tensiomyography measures the radial displacement of a muscle during an electrically evoked twitch contraction. (plos.org)
  • Tensiomyography (TMG) measures the radial displacement of a muscle belly during an electrically stimulated isometric twitch response. (plos.org)
  • Intraclass correlation coefficients (ICCs) and standard errors of measurement (SEMs) were calculated to assess between-day reliability. (bepress.com)
  • Intraclass correlation coefficient (ICC2,1), standard error of the measurement (SEM), and MD values were calculated. (cdc.gov)
  • Twenty-one male subjects were assigned to either a 10-week resistance-training program consisting of single-leg isometric plantarflexion ( n = 11) or to a non-training control group ( n = 10). (frontiersin.org)
  • Before and after the training period, plantarflexion force, peak Achilles tendon strain and stiffness were measured during isometric contractions, using a combination of dynamometry, ultrasound and kinematics data. (frontiersin.org)
  • Muscle contraction is induced with twitch type (one millisecond) of surface electrical stimulus. (wikipedia.org)
  • Several formulas currently exist to calculate the rate of displacement during the contraction phase of the maximal twitch response. (plos.org)
  • As such, a twitch provides information on muscle contractile properties and the functioning of the excitation-contraction coupling process. (plos.org)
  • Each physiological response is recorded in a separate graph channel, with an array of measurements and viewing tools designed to optimize data analysis. (biopac.com)
  • Yet, the influence of changes in tendon stiffness within the physiological range upon these lengthening contractions is unknown. (frontiersin.org)
  • This report summarizes current physiological and technical knowledge on esophageal pressure (Pes) measurements in patients receiving mechanical ventilation. (atsjournals.org)
  • Anatomical organization of intrinsic wing muscles suggests specific roles for the different motor elements in wing shape modulation, but testing these hypothesized functions requires challenging measurements of muscle activation and strain patterns, and force dynamics. (biologists.com)
  • Depending on their contraction dynamics, muscles can respond to different temporal components of their neural inputs (e.g. (silverchair.com)
  • The finding indicated that there were contractions of the muscles during the salat and exercise with almost same EMG's level. (waset.org)
  • The purpose of this study was to determine the effect of strength ramp isometric contraction on changes in surface electromyography (sEMG) signal characteristics of the hamstrings muscles. (waset.org)
  • Changes in strength, symptom intensity, MRI T2 relaxation measurements, which are indicative of edema, and dynamic mechanical parameters ( stiffness, effective mass, and damping) were ascertained prior to exercise, one hour after, and 24 hours later. (cdc.gov)
  • These data suggest this isometric upright row assessment is a reliable, portable, and cost-effective measure of UB strength to assess and monitor LEOs in field settings. (cdc.gov)
  • Thirty-two men (n = 16) and women (n = 16) were successfully strength-matched (≤10% difference) by maximal force produced during an isometric squat (IS) when normalized to body weight. (jssm.org)
  • Comparison of two abdominal training devices with an abdominal crunch using strength and EMG measurements. (sdsu.edu)
  • Some scholars advocate that NMES should not be used when the patient's consciousness level is improved, and the patient can carry out autonomous activities [ 13 ], while other studies suggested that early active contraction combined with NMES can more alleviate muscle strength loss and atrophy through different modes of muscle activation [ 14 ]. (biomedcentral.com)
  • Stability of Muscle Strength Over Multiple Measurements. (nih.gov)
  • They will perform a 10-second contraction with 25% of strength intensity during each 10-second contraction. (who.int)
  • Fascicle length does increase in response to longitudinal resistance training and in a contraction-mode specific manner. (sharpweighingscale.com)
  • Similar acute molecular responses to equivalent volumes of isometric, lengthening, or shortening mode resistance exercise. (sharpweighingscale.com)
  • RVE consisted of muscle contractions against resistance and concurrent whole-body vibration. (galileo-training.com)
  • The purpose of this study was to examine the test-retest reliability and minimum difference (MD) values of a novel and portable isometric upright row assessment in probation officers. (cdc.gov)
  • This investigation provides a foundation based on an isometric task to now examine dynamic tasks to see if similar results exist. (jssm.org)
  • The examination starts with inspection, followed by active and passive mobilization and isometric muscle testing. (medscape.com)
  • The two most frequently reported parameters are the maximum displacement (Dm) and the contraction time (Tc) [ 1 ]. (plos.org)
  • Nevertheless, the transparent bottom of the culture chamber allows microscopic imaging of the tissue attached to the posts during their contraction with high spatial resolution. (sciencebridge.de)
  • Time-frequency parameters of the surface myoelectric signal for assessing muscle fatigue during cyclic dynamic contractions. (phmsociety.org)
  • Measurements were obtained before and after bed rest, including a morning and evening assessment on the first day of recovery from bed rest. (galileo-training.com)
  • tendons also act as mechanical buffers to accommodate rapid stretches of the muscle-tendon unit (MTU) and thus contribute to mechanical energy dissipation via lengthening contractions. (frontiersin.org)
  • A balance between knee stability and shock absorption is achieved by eccentric quadriceps contractions during loading response. (medscape.com)
  • In seriously ill patients, PAOP helps assess volume status and, with simultaneous measurements of cardiac output, can help guide therapy. (msdmanuals.com)
  • Muscle function measurements contribute to the evaluation of potential therapeutics for muscle pathology, as well as to the determination of mechanisms underlying physiology of this tissue. (jove.com)