Muscle, SkeletalMusclesMuscle Fibers, SkeletalMuscle ProteinsMuscle ContractionMuscle DevelopmentMuscle, SmoothMyocytes, CardiacMuscle Fibers, Fast-TwitchMitochondria, MuscleMuscle, Smooth, VascularMuscle Fibers, Slow-TwitchMuscle DenervationSatellite Cells, Skeletal MuscleMuscle FatigueHeartCardiac OutputMuscular AtrophyMyocardiumMuscular DiseasesRabbitsMuscle CellsMyofibrilsCalciumTime FactorsMyosin Heavy ChainsArrhythmias, CardiacMyoblastsQuadriceps MuscleCardiac Surgical ProceduresIsometric ContractionGlycogenMuscle, StriatedMyocytes, Smooth MuscleMuscle WeaknessHindlimbRNA, MessengerCells, CulturedMuscle RelaxationDeath, Sudden, CardiacMyoblasts, SkeletalRats, Sprague-DawleyOculomotor MusclesPapillary MusclesInsulinRats, WistarNeck MusclesSarcolemmaMuscle SpindlesRegenerationSarcomeresRespiratory MusclesMyoD ProteinMyostatinMice, Inbred C57BLGlucoseSarcoplasmic ReticulumElectric StimulationOxygen ConsumptionPhysical ExertionMice, Inbred mdxExerciseMuscular Dystrophy, AnimalRyanodine Receptor Calcium Release ChannelCreatine KinaseSignal TransductionGene Expression RegulationPhysical Conditioning, AnimalTroponinAbdominal MusclesKineticsMyocardial ContractionMolecular Sequence DataCardiomegalyMasseter MuscleDiaphragmActinsDystrophinMice, TransgenicHypertrophyGlucose Transporter Type 4Mice, KnockoutAgingCitrate (si)-SynthasePsoas MusclesPhysical EnduranceEnergy MetabolismPhosphorylationElectromyographySkeletal Muscle MyosinsMyogeninAdenosine TriphosphateHeart DiseasesIntercostal MusclesCardiac Pacing, ArtificialDogsMyosinsMasticatory MusclesHeart VentriclesFacial Muscles