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 AtrophyMuscle RelaxationMuscular DiseasesCalciumMuscle, StriatedRana pipiensThoracicaMuscle WeaknessElectric StimulationNeck MusclesMyocytes, Smooth MuscleDiaphragmMasseter MuscleAnuraMotor NeuronsRabbitsSatellite Cells, Skeletal MuscleMuscular Dystrophy, AnimalElectromyographyMineral FibersQuadriceps MuscleTime FactorsHindlimbRespiratory MusclesPapillary MusclesMembrane PotentialsMice, Inbred mdxMasticatory MusclesAbdominal MusclesMyosinsIntercostal MusclesMuscle CellsFacial MusclesMotor EndplateBiomechanical PhenomenaHistocytochemistryCotton FiberSarcoplasmic ReticulumPectoralis MusclesAction PotentialsSarcolemmaDystrophinRegenerationMicroscopy, ElectronNADH Tetrazolium ReductaseMyoblastsRana esculentaSkeletal Muscle MyosinsRanidaeRats, WistarCaffeineActinsCells, CulturedCrustaceaPurkinje FibersGlycogenTendonsModels, BiologicalMuscular DystrophiesStress FibersKineticsReceptors, CholinergicImmunohistochemistryCatsHypertrophyNeural ConductionStress, MechanicalTemporal MuscleNerve Fibers, MyelinatedRats, Sprague-DawleyIsotonic ContractionProtein IsoformsMyositisMyostatinElectrophysiologyHindlimb Suspension