Mice, Inbred mdxMuscle, SkeletalMusclesMuscle Fibers, SkeletalMuscle ProteinsMuscle ContractionMuscle DevelopmentMuscular Dystrophy, AnimalMuscle, SmoothMuscular Dystrophy, DuchenneMuscle Fibers, Fast-TwitchDystrophinMitochondria, MuscleMuscle, Smooth, VascularMuscle Fibers, Slow-TwitchSatellite Cells, Skeletal MuscleMuscle DenervationMuscle FatigueMuscular AtrophyMuscular DiseasesMyoblastsMuscle CellsRabbitsDiaphragmMyofibrilsQuadriceps MuscleIsometric ContractionHindlimbMuscle WeaknessGlycogenUtrophinCalciumMyocytes, Smooth MuscleMuscle, StriatedMuscular DystrophiesMyoblasts, SkeletalRegenerationSarcolemmaOculomotor MusclesMuscle RelaxationNeck MusclesMyosin Heavy ChainsMice, Inbred C57BLMyostatinMyoD ProteinInsulinMuscle SpindlesRespiratory MusclesRNA, MessengerSarcoplasmic ReticulumTime FactorsPapillary MusclesMyocardiumCells, CulturedPhysical Conditioning, AnimalGlucoseAbdominal MusclesElectric StimulationCreatine KinasePhysical ExertionExerciseMasseter MuscleRats, WistarMyogeninRats, Sprague-DawleyGene Expression RegulationIntercostal MusclesCitrate (si)-SynthaseMasticatory MusclesSarcomeresGlucose Transporter Type 4KineticsPsoas MusclesRyanodine Receptor Calcium Release ChannelElectromyographySkeletal Muscle MyosinsAgingOxygen ConsumptionFacial MusclesSignal TransductionActinsPhysical EnduranceMolecular Sequence DataPectoralis MusclesInsulin ResistanceEnergy MetabolismHypertrophyNeuromuscular JunctionMice, TransgenicHindlimb SuspensionAdenosine TriphosphateMice, KnockoutPhosphorylationPhosphocreatineRana temporariaTroponinCell DifferentiationOrgan SpecificityDisease Models, AnimalGene Expression