Muscle, SkeletalMuscle ContractionMusclesMuscle Fibers, SkeletalDihydropyridinesMuscle ProteinsCalcium Channels, L-TypeIsradipineIsometric ContractionCalciumRana temporariaCalcium ChannelsRyanodine Receptor Calcium Release ChannelRana pipiensRabbitsAnuraRanidaeCalcium Channel BlockersTroponin CTroponinMuscle FatigueSarcoplasmic ReticulumMyosinsMuscle, SmoothElectric StimulationNifedipineTropomyosinRana esculentaRana catesbeianaMuscle DevelopmentTetracaineMembrane PotentialsMuscle, Smooth, VascularReceptors, NicotinicMyofibrilsCaffeineSarcolemmaMuscle Fibers, Fast-TwitchNitrendipineRegional Blood FlowKineticsMitochondria, MuscleOxadiazolesMuscle Fibers, Slow-TwitchRyanodineCalcium Channel AgonistsSarcomeresMyocardiumElectrophysiologyMuscle RelaxationIon ChannelsMuscle DenervationSatellite Cells, Skeletal MuscleTime FactorsCalcium SignalingElectric ConductivityCells, CulturedMuscular AtrophyMalignant HyperthermiaNaphthalenesulfonatesCalsequestrinPotassiumMyocardial ContractionExcitation Contraction CouplingModels, BiologicalMuscular DiseasesMolecular Sequence DataIon Channel GatingHindlimbCalcium-Transporting ATPasesAmino Acid SequenceArsenazo IIIElectromyographyVerapamilGuinea PigsMuscle CellsNicardipineQuadriceps MuscleAdenosine TriphosphateMyocytes, Smooth MuscleAction PotentialsNisoldipineMuscle, StriatedGlycogenRNA, MessengerMuscle SpindlesRats, Sprague-DawleyHeartRats, WistarMyoblastsActinsHypertonic SolutionsMuscle WeaknessMyosin Heavy ChainsMicroscopy, ElectronPapillary MusclesProtein IsoformsOculomotor MusclesDantroleneDose-Response Relationship, Drug