Muscle ContractionMuscle, SkeletalMusclesMuscle Fibers, SkeletalIsometric ContractionMuscle ProteinsTroponin CTroponinMuscle FatigueMuscle, SmoothMyosinsTropomyosinCalciumRabbitsElectric StimulationMuscle, Smooth, VascularMuscle DevelopmentDietary SupplementsRegional Blood FlowMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMitochondria, MuscleMuscle DenervationMuscle RelaxationElectromyographyMyocytes, Smooth MuscleSatellite Cells, Skeletal MuscleMuscular AtrophyMuscle SpindlesMuscle, StriatedMyofibrilsMuscular DiseasesMyocardial ContractionQuadriceps MuscleNeck MusclesTime FactorsMuscle CellsOculomotor MusclesHindlimbMuscle WeaknessUterine ContractionPapillary MusclesRespiratory MusclesRats, Sprague-DawleyRats, WistarAbdominal MusclesGlycogenSarcomeresCells, CulturedActinsMyosin Heavy ChainsPhysical ExertionFacial MusclesDose-Response Relationship, DrugGuinea PigsMyoblastsDiaphragmBiomechanical PhenomenaMasticatory MusclesTracheaMyocardiumMotor NeuronsRNA, MessengerMasseter MuscleSarcoplasmic ReticulumExercisePsoas MusclesInsulinVasoconstrictionIntercostal MusclesKineticsAdenosine TriphosphateNeuromuscular JunctionGlucosePhysical EnduranceModels, BiologicalSignal TransductionPhosphorylationPotassium ChlorideMuscular Dystrophy, AnimalOxygen ConsumptionAcetylcholineMice, Inbred C57BLEnergy MetabolismMyoblasts, SkeletalPhosphocreatineAgingSarcolemmaBody WeightCaffeinePectoralis MusclesDogsMyoD ProteinMyostatinTorqueMolecular Sequence DataRegenerationMyosin Light ChainsLegMice, Inbred mdx