Muscle, SkeletalMusclesMuscle Fibers, SkeletalMuscle ProteinsMuscle, SmoothMuscle ContractionMuscle DevelopmentMuscle, Smooth, VascularMyocardiumMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMitochondria, MuscleHeartMyocytes, CardiacPapillary MusclesMuscle DenervationMuscle FatigueMyofibrilsCalciumSatellite Cells, Skeletal MuscleRabbitsMyocardial ContractionMuscular AtrophyMuscle CellsMyocytes, Smooth MuscleSarcomeresMuscular DiseasesIsometric ContractionMuscle, StriatedMuscle RelaxationOculomotor MusclesNeck MusclesMuscle WeaknessMyosin Heavy ChainsQuadriceps MuscleTime FactorsMuscle SpindlesRespiratory MusclesSarcoplasmic ReticulumCells, CulturedCardiac OutputTroponinSarcolemmaRats, Sprague-DawleyRNA, MessengerGlycogenAbdominal MusclesTroponin CRyanodine Receptor Calcium Release ChannelHindlimbRats, WistarElectric StimulationMyoblastsMasseter MuscleDystrophinMice, Inbred mdxMuscular Dystrophy, AnimalActinsKineticsCreatine KinaseMasticatory MusclesFacial MusclesHeart VentriclesElectromyographyIntercostal MusclesInsulinMolecular Sequence DataRegenerationTropomyosinMyostatinMyoD ProteinMyosinsMice, Inbred C57BLMyoblasts, SkeletalGene Expression RegulationArrhythmias, CardiacTroponin IDiaphragmDogsOxygen ConsumptionPectoralis MusclesPsoas MusclesSignal TransductionPhysical ExertionChickensGlucoseMice, TransgenicOrgan SpecificityCardiac Surgical ProceduresMembrane PotentialsAgingExercisePhosphorylationAdenosine TriphosphateCardiomegalyAmino Acid SequenceCell DifferentiationDesminMuscular Dystrophy, DuchenneHypertrophy