Plyometric ExerciseMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMuscle Fibers, SkeletalNADH Tetrazolium ReductaseMuscle, SkeletalMusclesMuscle ContractionMuscular AtrophyMuscle DenervationMuscle ProteinsMuscle DevelopmentMuscle, SmoothSarcoplasmic ReticulumNerve FibersRabbitsMuscle, Smooth, VascularMyofibrilsCalciumRana temporariaCalcium-Transporting ATPasesCatsElectric StimulationExerciseIsometric ContractionMuscle FatigueHindlimbMotor NeuronsMyosin Heavy ChainsNeuromuscular JunctionMitochondria, MuscleNeurons, AfferentPsoas MusclesLumbosacral RegionMuscle SpindlesSarcomeresTime FactorsDietary FiberOculomotor MusclesDiaphragmMuscle RelaxationRana pipiensSacrococcygeal RegionMuscular DiseasesAction PotentialsAnuraElectromyographyMuscle, StriatedAfferent PathwaysMuscle WeaknessMotor Neurons, GammaThoracicaMembrane PotentialsPapillary MusclesNeck MusclesMyocytes, Smooth MuscleMasseter MuscleQuadriceps MuscleNeural ConductionMuscular Dystrophy, AnimalSpinal CordSatellite Cells, Skeletal MuscleRespiratory MusclesMotor EndplateMyosinsMineral FibersMasticatory MusclesBiomechanical PhenomenaAbdominal MusclesMice, Inbred mdxInterneuronsRecruitment, NeurophysiologicalIntercostal MusclesHistocytochemistryMuscle CellsPeripheral NervesCells, CulturedElectrophysiologyFacial MusclesSarcolemmaMicroscopy, ElectronCaffeineModels, BiologicalKineticsCotton FiberPectoralis MusclesRats, WistarRanidaeRana esculentaRegenerationDystrophinReflexActinsSpinocerebellar TractsRats, Sprague-DawleyMyoblastsPurkinje FibersMice, Inbred C57BLImmunohistochemistrySkeletal Muscle Myosins