Quadriceps MuscleArmElectromyographyMusclesMuscle, SkeletalThighMuscle ContractionMuscle WeaknessMuscle FatigueMuscle ProteinsIsometric ContractionMuscle Fibers, SkeletalMuscle, SmoothFemoral NerveSciatic NerveMuscle StrengthTenodesisMuscle, Smooth, VascularMuscle DevelopmentTorquePeripheral NervesKnee JointKneeTendonsNerve FibersTendon InjuriesElbowOptic NerveBiomechanical PhenomenaElectric StimulationLegNerve BlockMuscle Fibers, Fast-TwitchRuptureMuscle Fibers, Slow-TwitchMuscle Strength DynamometerPatellaNerve RegenerationMotor NeuronsSupinationMuscle SpindlesPatellofemoral Pain SyndromeRespiratory MusclesMuscular AtrophyMitochondria, MuscleSural NerveMuscle DenervationMuscular DiseasesKnee InjuriesAnterior Cruciate LigamentReflex, StretchRange of Motion, ArticularNerve EndingsAbdominal MusclesSpinal NervesMedian NerveMyocytes, Smooth MuscleTibial NerveFacial NerveNerve CrushExerciseMuscle RelaxationPeripheral Nerve InjuriesOculomotor MusclesHindlimbNeck MusclesUlnar NerveWeight LiftingPhysical EnduranceReflexArm InjuriesElectric Stimulation TherapyElbow JointMuscle, StriatedPatellar LigamentRotator CuffGaitMasseter MuscleMovementPapillary MusclesPhysical ExertionTime FactorsTenotomyMuscle SpasticityPectoralis MusclesBrachial PlexusTendinopathyNeural ConductionH-ReflexMusculoskeletal Physiological PhenomenaOsteoarthritis, KneeWeight-BearingTrigeminal NervePhrenic NerveNerve Growth FactorsNerve Growth FactorRadial NerveMuscle CellsFacial MusclesSpinal Nerve Roots