Isometric ContractionMuscle ContractionMuscle, SkeletalMusclesMuscle FatigueElectromyographyMuscle, SmoothMuscle Fibers, SkeletalIsotonic ContractionTorqueElectric StimulationMyocardial ContractionUterine ContractionMuscle, Smooth, VascularElbowMuscle RelaxationRecruitment, NeurophysiologicalExtracorporeal Membrane OxygenationMotor NeuronsMuscle ProteinsCalciumSarcomeresKneeBiomechanical PhenomenaOxygenTime FactorsMyosinsMuscle StrengthPapillary MusclesQuadriceps MuscleVasoconstrictionPhysical EndurancePsoas MusclesRabbitsMuscle SpindlesPhysical ExertionMusculoskeletal Physiological PhenomenaMyofibrilsVolitionGuinea PigsTracheaPotassium ChlorideOxygen ConsumptionMyographyMuscle DevelopmentDose-Response Relationship, DrugPhenylephrineStress, MechanicalRana temporariaMuscle Fibers, Fast-TwitchPhosphocreatineAcetylcholineMyosin Light ChainsHindlimbRats, WistarLegAdenosine TriphosphateRats, Sprague-DawleyVasoconstrictor AgentsModels, BiologicalElasticityCatsThighMuscle Fibers, Slow-TwitchExerciseTendonsAction PotentialsAnuraNorepinephrineAnkle JointMuscle WeaknessEvoked Potentials, MotorActinsMasseter MuscleAorta, ThoracicReflex, StretchMuscle Strength DynamometerDogsHand StrengthMyocytes, Smooth MuscleMovementMotor CortexHandFingersPeristalsisReflexRana esculentaRegional Blood FlowForearmMuscle DenervationKineticsGastrointestinal MotilityMuscle TonusArmAnalysis of VarianceHeart RateEnergy MetabolismWeight-BearingSpectroscopy, Near-InfraredBlood Pressure