Muscle ContractionMuscle, SkeletalMusclesMuscle Fibers, SkeletalMuscle, SmoothIsometric ContractionMuscle ProteinsMuscle, Smooth, VascularMuscle DevelopmentMuscle FatigueMuscle Fibers, Fast-TwitchUterine ContractionMuscle Fibers, Slow-TwitchMyocardial ContractionElectric StimulationCalciumMuscle RelaxationMitochondria, MuscleMuscle DenervationElectromyographyRabbitsMyocytes, Smooth MuscleMuscle SpindlesMyofibrilsSatellite Cells, Skeletal MuscleMuscle, StriatedMuscular AtrophyGuinea PigsPapillary MusclesQuadriceps MuscleProfessional AutonomyMuscle CellsTime FactorsVasoconstrictionNeck MusclesOculomotor MusclesMuscular DiseasesMuscle WeaknessRats, WistarRats, Sprague-DawleyTracheaRespiratory MusclesMyosinsSarcomeresAbdominal MusclesIsotonic ContractionActinsMotor NeuronsBiomechanical PhenomenaPotassium ChlorideGlycogenPhysical ExertionCells, CulturedDiaphragmDose-Response Relationship, DrugMyocardiumMyosin Heavy ChainsSarcoplasmic ReticulumFacial MusclesTropomyosinAdenosine TriphosphateMasticatory MusclesPeristalsisPsoas MusclesMyoblastsNeuromuscular JunctionMasseter MuscleTorqueCaffeineMyosin Light ChainsDogsKineticsIntercostal MusclesRNA, MessengerExerciseTroponin CPhosphorylationModels, BiologicalGastrointestinal MotilityTroponinUrinary BladderSignal TransductionVasoconstrictor AgentsInsulinCarbacholPhysical EnduranceNorepinephrineCatsMuscular Dystrophy, AnimalPhosphocreatinePotassiumSarcolemmaMembrane PotentialsOxygen ConsumptionGlucoseMuscle TonusRegional Blood FlowPhenylephrineMyoblasts, SkeletalLeg