Isometric ContractionMuscle ContractionKnee JointMuscle, SkeletalKneeMusclesMuscle FatigueElectromyographyMuscle, SmoothOsteoarthritis, KneeMuscle Fibers, SkeletalIsotonic ContractionTorqueElectric StimulationMyocardial ContractionUterine ContractionMuscle, Smooth, VascularArthroplasty, Replacement, KneeElbowMuscle RelaxationRecruitment, NeurophysiologicalBiomechanical PhenomenaMotor NeuronsKnee InjuriesKnee ProsthesisMuscle ProteinsCalciumMuscle StrengthQuadriceps MuscleSarcomeresMyosinsTime FactorsPapillary MusclesVasoconstrictionPhysical EndurancePsoas MusclesRabbitsMuscle SpindlesPhysical ExertionMusculoskeletal Physiological PhenomenaVolitionMyofibrilsGuinea PigsTracheaPotassium ChlorideStress, MechanicalMyographyHindlimbMuscle DevelopmentThighMuscle Fibers, Fast-TwitchRana temporariaLegPhenylephrineDose-Response Relationship, DrugAcetylcholineMyosin Light ChainsAnkle JointTendonsWeight-BearingPhosphocreatineRats, WistarMuscle WeaknessElasticityAdenosine TriphosphateMuscle Fibers, Slow-TwitchModels, BiologicalCatsMuscle Strength DynamometerVasoconstrictor AgentsMovementRats, Sprague-DawleyAction PotentialsExerciseAnuraEvoked Potentials, MotorReflex, StretchActinsNorepinephrineMasseter MuscleRange of Motion, ArticularAorta, ThoracicMyocytes, Smooth MuscleHandReflexHand StrengthDogsPeristalsisFingersMotor CortexRana esculentaMuscle TonusMuscle DenervationFemoral NerveAnalysis of VarianceGastrointestinal MotilityElbow JointArmForearmUrinary Bladder