Muscle, SkeletalMuscle ContractionMusclesMuscle Fibers, SkeletalIsometric ContractionRana temporariaMuscle ProteinsRana pipiensMyocardiumAnuraRanidaeTroponin CCalciumTroponinMuscle FatigueMyosinsMuscle, SmoothRabbitsElectric StimulationTropomyosinRana esculentaMuscle DevelopmentRana catesbeianaMyofibrilsMuscle, Smooth, VascularMuscle Fibers, Fast-TwitchMitochondria, MuscleRegional Blood FlowTetracaineMuscle Fibers, Slow-TwitchSarcoplasmic ReticulumSarcomeresMuscle RelaxationMembrane PotentialsMuscle DenervationTime FactorsCaffeineSatellite Cells, Skeletal MuscleMuscular AtrophyMyocardial ContractionNaphthalenesulfonatesKineticsMuscular DiseasesPotassiumSarcolemmaHindlimbMuscle CellsModels, BiologicalHeartArsenazo IIIElectromyographyQuadriceps MuscleAdenosine TriphosphateGlycogenMyocytes, Smooth MuscleElectrophysiologyMuscle, StriatedRats, WistarRats, Sprague-DawleyMuscle SpindlesRyanodine Receptor Calcium Release ChannelActinsAction PotentialsMyoblastsElectric ConductivityMyosin Heavy ChainsHypertonic SolutionsMuscle WeaknessIon ChannelsBiomechanical PhenomenaMyoblasts, SkeletalOculomotor MusclesDantroleneRNA, MessengerNeck MusclesCells, CulturedInsulinPhysical ExertionCalcium ChannelsPapillary MusclesUterine ContractionDogsRespiratory MusclesRigor MortisMagnesiumEnergy MetabolismGlucoseDiaphragmDose-Response Relationship, DrugNeuromuscular JunctionRegenerationExerciseAbdominal MusclesOxygen ConsumptionGallopamilSignal TransductionMyoD ProteinMyostatinMuscular Dystrophy, AnimalPhysical Conditioning, Animal