Muscle, SkeletalMuscle ContractionMusclesMuscle Fibers, SkeletalIsometric ContractionRana temporariaMuscle ProteinsRana pipiensAnuraRanidaeCalciumTroponin CTroponinMuscle FatigueMyosinsMuscle, SmoothRabbitsElectric StimulationTropomyosinRana esculentaRana catesbeianaMuscle DevelopmentMembrane PotentialsMyofibrilsMuscle, Smooth, VascularMuscle Fibers, Fast-TwitchTetracaineMitochondria, MuscleMuscle Fibers, Slow-TwitchRegional Blood FlowSarcoplasmic ReticulumSarcomeresMuscle RelaxationMuscle DenervationTime FactorsCaffeineSatellite Cells, Skeletal MuscleMembranesCell MembraneKineticsMuscular AtrophyPotassiumNaphthalenesulfonatesModels, BiologicalMuscular DiseasesHindlimbAdenosine TriphosphateSarcolemmaElectric ConductivityIntracellular MembranesElectrophysiologyArsenazo IIIElectromyographyIon ChannelsMuscle CellsActinsMembrane LipidsQuadriceps MuscleMyocytes, Smooth MuscleCell Membrane PermeabilityGlycogenMuscle, StriatedMuscle SpindlesAction PotentialsRyanodine Receptor Calcium Release ChannelCells, CulturedHypertonic SolutionsMyoblastsRats, Sprague-DawleyRats, WistarMuscle WeaknessMyocardial ContractionMyosin Heavy ChainsRNA, MessengerCalcium ChannelsDantroleneOculomotor MusclesBiomechanical PhenomenaInsulinMagnesiumMicroscopy, ElectronNeck MusclesMyocardiumMolecular Sequence DataSodiumHydrogen-Ion ConcentrationPhysical ExertionPapillary MusclesUterine ContractionGlucoseMyoblasts, SkeletalSignal TransductionRespiratory MusclesRigor MortisNeuromuscular JunctionDose-Response Relationship, DrugDiaphragmMembranes, ArtificialAbdominal MusclesExercise