Muscle, SkeletalMuscle ContractionMusclesRana temporariaMuscle Fibers, SkeletalIsometric ContractionRana pipiensAnuraMuscle FatigueRanidaeMuscle ProteinsElectric StimulationCalciumRana esculentaMuscle, SmoothRana catesbeianaMyofibrilsMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMyosinsTroponin CTroponinMuscle DevelopmentRabbitsTetracaineMuscle RelaxationTetanyMuscle, Smooth, VascularSarcoplasmic ReticulumTime FactorsSarcomeresMembrane PotentialsTropomyosinMitochondria, MuscleCaffeineHindlimbNaphthalenesulfonatesMuscle DenervationSatellite Cells, Skeletal MuscleRegional Blood FlowMyocardial ContractionPotassiumAdenosine TriphosphateKineticsMuscular AtrophyArsenazo IIIPhosphocreatineMotor NeuronsBiomechanical PhenomenaHypertonic SolutionsElectrophysiologyElectric ConductivityRats, WistarMuscular DiseasesModels, BiologicalAction PotentialsSarcolemmaDantroleneElectromyographyEnergy MetabolismIon ChannelsCatsRigor MortisBody Temperature RegulationUterine ContractionRyanodine Receptor Calcium Release ChannelMuscle CellsGlycogenQuadriceps MuscleMuscle SpindlesMyocytes, Smooth MuscleMagnesiumActinsMuscle, StriatedGallopamilOxygen ConsumptionMyoblastsCalcium ChannelsDiaphragmRats, Sprague-DawleyMuscle WeaknessMyosin Heavy ChainsOculomotor MusclesNeuromuscular JunctionSodiumPerchloratesPapillary MusclesPhenolsulfonphthaleinNeck MusclesPhysical ExertionRana ridibundaMyocardiumInsulinStrophanthinsMyoblasts, SkeletalFura-2Cells, CulturedRNA, MessengerDose-Response Relationship, DrugRespiratory Muscles