PolymyositisMuscle WeaknessMusclesMuscle, SkeletalMyositisMuscular DiseasesElectromyographyDermatomyositisMuscular Dystrophies, Limb-GirdleMuscular AtrophyForelimbArmMuscle ProteinsMuscle, SmoothCreatine KinaseMotor CortexNeural ConductionMuscle Fibers, SkeletalMuscle, Smooth, VascularMuscle DevelopmentBiomechanical PhenomenaMuscle ContractionBiopsyPedigreeMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationMuscle Fibers, Slow-TwitchMyocytes, Smooth MuscleMitochondria, MuscleNeck MusclesOculomotor MusclesMuscle, StriatedMuscle SpindlesMuscle RelaxationRespiratory MusclesPapillary MusclesAbdominal MusclesQuadriceps MuscleMuscle CellsMasseter MuscleFacial MusclesMasticatory MusclesIntercostal MusclesIsometric ContractionSatellite Cells, Skeletal MusclePectoralis MusclesPsoas MusclesMyofibrilsTemporal MuscleHindlimbRabbitsElectric StimulationCells, CulturedMyosin Heavy ChainsCalciumPharyngeal MusclesTime FactorsDiaphragmMotor NeuronsGlycogenNeuromuscular JunctionMuscular Dystrophy, AnimalMyoblastsRats, Sprague-DawleyRNA, MessengerMuscle CrampActinsRats, WistarRegenerationMice, Inbred mdxSarcomeresMyostatinMyoD ProteinLegPhysical ExertionMuscle Stretching ExercisesMyocardiumMuscle RigidityExerciseHypertrophyDystrophinPhysical EnduranceMyoblasts, SkeletalAortaSignal TransductionTendonsInsulinGene Expression RegulationHindlimb SuspensionKineticsMembrane PotentialsAgingCatsMice, Inbred C57BLThighMuscle NeoplasmsPterygoid MusclesGuinea PigsOxygen Consumption