Mechanotransduction, CellularStress, MechanicalReflex, StretchMuscle ContractionMuscle, SkeletalTorqueElectromyographyIsotonic ContractionMuscle SpindlesBiomechanical PhenomenaMuscle FatiguePulmonary Stretch ReceptorsMusclesSarcomeresMuscle StrengthElectric StimulationMechanoreceptorsHand StrengthMuscle Fibers, SkeletalRana temporariaTime FactorsKneeElasticityMuscle RelaxationMuscle Stretching ExercisesElbowMovementMotor Neurons, GammaPhysical ExertionPsoas MusclesMotor NeuronsCatsMyosinsMyocardial ContractionTendonsExerciseCalciumPapillary MusclesRabbitsPhysical StimulationAnkle JointLegMyographyReflexFingersMuscle Strength DynamometerVolitionMuscle, SmoothPhysical EnduranceMuscle TonusRana esculentaRange of Motion, ArticularVasoconstrictionPressureKnee JointRecruitment, NeurophysiologicalMusculoskeletal Physiological PhenomenaMolecular Sequence DataPostureHindlimbArmWeight-BearingQuadriceps MuscleVibrationHeart RateNeurons, AfferentBlood PressureThumbMuscle, Smooth, VascularModels, BiologicalThighAdaptation, PhysiologicalAction PotentialsElbow JointNeural ConductionAmino Acid SequenceAnuraDecerebrate StateAnalysis of VarianceKineticsBase SequenceAdenosine TriphosphateRats, Sprague-DawleyDiacetylAchilles TendonHeartEndothelium, VascularCells, CulturedAnkleH-ReflexDose-Response Relationship, DrugMuscle Fibers, Fast-TwitchIsometric ContractionVasoconstrictor AgentsVasodilationPhenylephrinePostural BalanceFootRats, WistarWrist