Muscle Fibers, Slow-TwitchMusclesMuscle Fibers, SkeletalMuscle Fibers, Fast-TwitchMuscle ContractionMuscle, SkeletalExercise TestMuscle DenervationExercise TherapyExerciseMuscle ProteinsMotor NeuronsExercise ToleranceNeural ConductionMuscle DevelopmentElectric StimulationMuscle, SmoothSarcoplasmic ReticulumPhysical ExertionIsometric ContractionTime FactorsRana temporariaNerve FibersMyofibrilsCatsMuscle FatigueMuscle, Smooth, VascularNeuromuscular JunctionRabbitsDiaphragmMitochondria, MuscleMyosin Heavy ChainsMyocardiumOxygen ConsumptionCalcium-Transporting ATPasesPhysical EnduranceCalciumSarcomeresElectromyographyMuscle SpindlesPsoas MusclesRana pipiensAnuraDietary FiberMuscular AtrophyMuscle RelaxationMuscular DiseasesQuadriceps MuscleOculomotor MusclesMuscle WeaknessPapillary MusclesRespiratory MusclesHindlimbMuscle, StriatedMembrane PotentialsAction PotentialsMotor EndplateNeck MusclesBiomechanical PhenomenaThoracicaMasseter MuscleAbdominal MusclesGlycogenMuscular Dystrophy, AnimalMyocytes, Smooth MuscleSatellite Cells, Skeletal MuscleMolecular Sequence DataBicyclingMyosinsCaffeineMasticatory MusclesMineral FibersRunningHeart RateIntercostal MusclesBase SequenceMice, Inbred mdxSnakesRats, WistarHistocytochemistrySarcolemmaRestLactic AcidMuscle Stretching ExercisesMuscle CellsRanidaeResistance TrainingLegFacial MusclesEnergy MetabolismTubocurarineAdaptation, PhysiologicalRana esculentaAgingPectoralis MusclesKineticsMyocardial ContractionPhysical FitnessCotton FiberMicroscopy, Electron