Isometric ContractionMuscle ContractionMuscle FatigueElectromyographyMuscle, SkeletalTorqueVolitionElbowHand StrengthKneeMotor NeuronsRecruitment, NeurophysiologicalElectric StimulationPhysical EnduranceMuscle StrengthPhysical ExertionEvoked Potentials, MotorQuadriceps MuscleExerciseForearmIsotonic ContractionMusclesFingersH-ReflexElbow JointMaximal Voluntary VentilationThumbHandFemoral NerveMotor CortexPeroneal NerveReflexBiomechanical PhenomenaLegTime FactorsTranscranial Magnetic StimulationReflex, StretchAnkle JointHeart RateArmAdaptation, PhysiologicalPyramidal TractsMyocardial ContractionVibrationMovementUterine ContractionBlood PressureMuscle Fibers, SkeletalAnkleTendonsSympathetic Nervous SystemAction PotentialsPhosphocreatineMuscle SpindlesFootTibial NerveStress, MechanicalRegional Blood FlowKnee JointMuscle, SmoothAnalysis of VarianceMuscle RelaxationErgometryThighIschemiaPostureSkin TemperatureBicyclingResistance TrainingRestVasoconstrictionSarcomeresOxygen ConsumptionMyographyMusculoskeletal Physiological PhenomenaMuscle WeaknessMuscle Strength DynamometerCalciumBaroreflexMyosinsVoluntary ProgramsReference ValuesWeight-BearingNeuromuscular JunctionAgingPapillary MusclesPsoas MusclesWeight LiftingExercise TestReflex, MonosynapticToesFatigueNeural ConductionMuscle, Smooth, VascularWristBlood Flow VelocityRana temporariaMotor Neurons, GammaGuinea PigsFeedback, Sensory