Muscle ContractionMuscle, SkeletalTorqueIsotonic ContractionMuscle FatigueElectromyographyMuscle StrengthMusclesBiomechanical PhenomenaElectric StimulationSarcomeresHand StrengthMuscle RelaxationKneeRana temporariaMuscle Fibers, SkeletalElbowTime FactorsPhysical ExertionPsoas MusclesMuscle Strength DynamometerMyosinsPapillary MusclesExerciseMusculoskeletal Physiological PhenomenaPhysical EnduranceMyocardial ContractionVolitionRecruitment, NeurophysiologicalMyographyQuadriceps MuscleStress, MechanicalDiagnostic Tests, RoutineCalciumVasoconstrictionMovementLegMotor NeuronsMuscle, SmoothRabbitsKnee JointElasticityRana esculentaAnuraFingersTendonsAnkle JointRange of Motion, ArticularArmThighMuscle, Smooth, VascularPhosphocreatineHeart RateVasoconstrictor AgentsMuscle TonusMuscle Fibers, Fast-TwitchVasodilationBlood PressureModels, BiologicalAdenosine TriphosphateElbow JointReproducibility of ResultsPhenylephrinePotassium ChlorideMuscle WeaknessSensitivity and SpecificityAcetylcholineDose-Response Relationship, DrugMuscle SpindlesAnalysis of VarianceWeight-BearingTetanyHindlimbMyosin Light ChainsAorta, ThoracicMuscle Fibers, Slow-TwitchTracheaVasodilator AgentsForearmEvoked Potentials, MotorEndothelium, VascularReflex, StretchMotor CortexWristRegional Blood FlowNeck MusclesActomyosinDogsHeartPhosphatesArteriesDiaphragmNorepinephrineThumbRana pipiensAgingHolothurinReference ValuesMuscle Stretching ExercisesAdaptation, Physiological