Isometric ContractionMuscle SpindlesElectromyographyMuscle ContractionMuscle FatigueMuscle, SkeletalTorqueVolitionMuscle StrengthElbowKneeElectric StimulationPhysical EnduranceThighMusclesPhysical ExertionMotor NeuronsMuscle Strength DynamometerExerciseWeight LiftingBiomechanical PhenomenaHand StrengthRecruitment, NeurophysiologicalEvoked Potentials, MotorH-ReflexAnkle JointKnee JointLegIsotonic ContractionMovementPhysical Education and TrainingTime FactorsFingersForearmThumbQuadriceps MuscleVoluntary ProgramsMotor CortexReflexReflex, StretchPyramidal TractsHandReflex, MonosynapticMyocardial ContractionElbow JointUterine ContractionTranscranial Magnetic StimulationRange of Motion, ArticularArmAgingAnalysis of VarianceWristPeroneal NerveMotor Neurons, GammaAnkleMuscle RelaxationHeart RateMuscle, SmoothAction PotentialsAdaptation, PhysiologicalVibrationFemoral NerveVasoconstrictionMyographyTetanyMuscle Fibers, SkeletalBlood PressureTendonsTibial NerveToesSympathetic Nervous SystemRadial NerveStress, MechanicalRegional Blood FlowNeurons, AfferentPhosphocreatineFootNeural ConductionUlnar NervePostureMagneticsCalciumMasticatory MusclesMuscle WeaknessAchilles TendonNeck MusclesRunningTremorFeedback, SensoryReaction TimeResistance TrainingMechanoreceptorsAbdominal MusclesMotor ActivityWeight-BearingDiaphragmMuscle SpasticitySkin TemperatureAccelerationPressure