Muscle Fibers, SkeletalMusclesMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMuscle, SkeletalMuscle ContractionMuscle ProteinsMuscle DevelopmentMuscle, SmoothMuscle DenervationNerve FibersMuscle, Smooth, VascularMyofibrilsMuscle FatigueRana temporariaIsometric ContractionMitochondria, MuscleMyosin Heavy ChainsPsoas MusclesDietary FiberMuscle SpindlesSarcomeresOculomotor MusclesNeuromuscular JunctionMuscular AtrophyCalciumMuscle RelaxationMuscular DiseasesMuscle, StriatedRana pipiensThoracicaMuscle WeaknessElectric StimulationRabbitsTime FactorsMyocytes, Smooth MuscleNeck MusclesDiaphragmMasseter MuscleAnuraMotor NeuronsSatellite Cells, Skeletal MuscleMuscular Dystrophy, AnimalMineral FibersElectromyographyQuadriceps MuscleHindlimbRespiratory MusclesMembrane PotentialsPapillary MusclesMice, Inbred mdxMasticatory MusclesAbdominal MusclesHistocytochemistryMyosinsIntercostal MusclesMuscle CellsMicroscopy, ElectronBiomechanical PhenomenaFacial MusclesMotor EndplateCotton FiberPectoralis MusclesSarcoplasmic ReticulumAction PotentialsSarcolemmaCells, CulturedRegenerationImmunohistochemistryDystrophinRats, WistarModels, BiologicalNADH Tetrazolium ReductaseMyoblastsActinsRana esculentaSkeletal Muscle MyosinsRanidaeGlycogenCaffeineKineticsMice, Inbred C57BLRats, Sprague-DawleyTendonsCrustaceaPurkinje FibersAgingMuscular DystrophiesStress, MechanicalStress FibersRNA, MessengerCatsReceptors, CholinergicHypertrophyProtein IsoformsNeural ConductionTemporal MuscleNerve Fibers, MyelinatedIsotonic ContractionMyostatin