Muscle, SkeletalMuscle ContractionMusclesMuscle Fibers, SkeletalIsometric ContractionRana temporariaMuscle ProteinsRana pipiensAnuraMuscle FatigueRanidaeCalciumTroponin CTroponinElectric StimulationMyosinsMuscle, SmoothRabbitsTropomyosinRana esculentaMuscle DevelopmentRana catesbeianaMyofibrilsMuscle Fibers, Fast-TwitchMuscle, Smooth, VascularMuscle Fibers, Slow-TwitchMitochondria, MuscleTetracaineRegional Blood FlowSarcomeresSarcoplasmic ReticulumMuscle RelaxationMembrane PotentialsMuscle DenervationCaffeineTime FactorsSatellite Cells, Skeletal MuscleMuscular AtrophyNaphthalenesulfonatesKineticsHindlimbMuscular DiseasesPotassiumElectromyographyModels, BiologicalSarcolemmaElectrophysiologyAction PotentialsArsenazo IIIGlycogenDiaphragmMuscle CellsMuscle SpindlesQuadriceps MuscleAdenosine TriphosphateMyocytes, Smooth MuscleHypertonic SolutionsMuscle, StriatedDantroleneRats, WistarElectric ConductivityRats, Sprague-DawleyRyanodine Receptor Calcium Release ChannelMyoblastsNeuromuscular JunctionActinsOculomotor MusclesBiomechanical PhenomenaMyosin Heavy ChainsMuscle WeaknessTetanyMyocardial ContractionIon ChannelsMotor NeuronsNeck MusclesPhysical ExertionPapillary MusclesCalcium ChannelsMagnesiumInsulinUterine ContractionMyoblasts, SkeletalMyocardiumRespiratory MusclesRigor MortisRNA, MessengerCells, CulturedMuscular Dystrophy, AnimalMyostatinEnergy MetabolismAbdominal MusclesExerciseDose-Response Relationship, DrugGlucoseMice, Inbred mdxMyoD ProteinPhysical Conditioning, AnimalSodiumGallopamilOxygen Consumption