Pelvic Floor DisordersPelvic FloorPelvisMusclesMuscle ProteinsMuscle, SmoothMuscle, SkeletalMuscle Fibers, SkeletalMuscle, Smooth, VascularMuscle DevelopmentMuscle ContractionMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationMuscle Fibers, Slow-TwitchMyocytes, Smooth MuscleMitochondria, MuscleNeck MusclesOculomotor MusclesMuscle, StriatedMuscle SpindlesMuscle RelaxationRespiratory MusclesMuscle WeaknessPapillary MusclesAbdominal MusclesQuadriceps MuscleMuscle CellsMasseter MuscleFacial MusclesMasticatory MusclesIntercostal MusclesElectromyographyMuscular AtrophyIsometric ContractionSatellite Cells, Skeletal MusclePectoralis MusclesMuscular DiseasesPsoas MusclesMyofibrilsTemporal MuscleHindlimbRabbitsElectric StimulationCells, CulturedMyosin Heavy ChainsCalciumPharyngeal MusclesTime FactorsDiaphragmBiomechanical PhenomenaMotor NeuronsGlycogenNeuromuscular JunctionMuscular Dystrophy, AnimalMyoblastsRats, Sprague-DawleyRNA, MessengerMuscle CrampActinsRats, WistarRegenerationMice, Inbred mdxSarcomeresMyostatinMyoD ProteinLegPhysical Exertion