Muscle, SkeletalMusclesMuscle Fibers, SkeletalHeartMuscle ProteinsMuscle ContractionMuscle DevelopmentHeart RateMuscle, SmoothMuscle Fibers, Fast-TwitchMitochondria, MuscleMuscle, Smooth, VascularMuscle Fibers, Slow-TwitchMuscle DenervationSatellite Cells, Skeletal MuscleMuscle FatigueMuscular AtrophyHeart FailureMuscular DiseasesRabbitsMyocardiumMuscle CellsMyofibrilsQuadriceps MuscleCalciumMyoblastsGlycogenTime FactorsHeart DiseasesIsometric ContractionMuscle WeaknessMyocytes, Smooth MuscleMuscle, StriatedHindlimbMyosin Heavy ChainsMuscle RelaxationOculomotor MusclesMyoblasts, SkeletalRNA, MessengerInsulinHeart TransplantationHeart Defects, CongenitalNeck MusclesSarcoplasmic ReticulumMuscle SpindlesRats, WistarRats, Sprague-DawleyRespiratory MusclesPapillary MusclesMyoD ProteinMyostatinRegenerationOxygen ConsumptionCells, CulturedExerciseGlucoseSarcolemmaElectric StimulationMice, Inbred mdxMuscular Dystrophy, AnimalFetal HeartAbdominal MusclesMice, Inbred C57BLPhysical Conditioning, AnimalKineticsCreatine KinaseSarcomeresPhysical ExertionGene Expression RegulationMasseter MuscleDiaphragmSignal TransductionMolecular Sequence DataGlucose Transporter Type 4Citrate (si)-SynthaseEnergy MetabolismAgingRyanodine Receptor Calcium Release ChannelPhysical EnduranceDystrophinElectromyographyPsoas MusclesSkeletal Muscle MyosinsMyogeninAdenosine TriphosphateIntercostal MusclesMasticatory MusclesActinsPhosphocreatineHypertrophyFacial MusclesInsulin ResistanceHeart ValvesOrgan SpecificityPhosphorylationPectoralis MusclesMice, KnockoutHeart AtriaTroponinRegional Blood Flow