Muscle ContractionMuscle, SkeletalMusclesIsometric ContractionMuscle Fibers, SkeletalElectric StimulationMuscle FatigueMuscle ProteinsMuscle Fibers, Fast-TwitchMuscle, SmoothCalciumHindlimbMyocardial ContractionTroponin CTroponinMuscle Fibers, Slow-TwitchMyofibrilsMotor NeuronsElectromyographyMyosinsTime FactorsRabbitsPapillary MusclesTropomyosinMuscle, Smooth, VascularMuscle DevelopmentMuscle DenervationMuscle RelaxationAnuraRana temporariaRegional Blood FlowMuscular AtrophyMitochondria, MuscleAction PotentialsCatsRats, WistarDantroleneGuinea PigsUterine ContractionMuscle SpindlesBiomechanical PhenomenaPhysical Conditioning, AnimalPhysical ExertionTorqueRats, Sprague-DawleyMyocardiumGallamine TriethiodideGlycogenTendonsVas DeferensIsotonic ContractionNeural ConductionHindlimb SuspensionFerretsLegPhosphocreatineDogsMuscular DiseasesAnkle JointQuadriceps MuscleMyosin Heavy ChainsDiaphragmPhysical EnduranceNeuromuscular JunctionSarcomeresMyocytes, Smooth MuscleMembrane PotentialsMyostatinSatellite Cells, Skeletal MuscleMuscle WeaknessVasoconstrictionOrgan SizeMusculoskeletal Physiological PhenomenaMuscle, StriatedDose-Response Relationship, DrugAdenosine TriphosphateRecruitment, NeurophysiologicalOxygen ConsumptionNeck MusclesExerciseMuscle StrengthTracheaMuscle CellsOculomotor MusclesSarcoplasmic ReticulumBody WeightEnergy MetabolismAgingPotassium ChlorideRespiratory MusclesStress, MechanicalRNA, MessengerRunningAcetylcholineInsulinKineticsModels, BiologicalAbdominal MusclesMuscle TonusActins