Muscle ContractionMuscle, SkeletalMuscle Fibers, SkeletalIsometric ContractionMusclesSarcomeresMuscle ProteinsTroponin CTroponinMyosinsMuscle FatigueTropomyosinCalciumRabbitsElectric StimulationMyofibrilsMuscle, SmoothRegional Blood FlowMuscle DevelopmentMuscle, Smooth, VascularConnectinMuscle Fibers, Fast-TwitchMyocardial ContractionMuscle Fibers, Slow-TwitchMuscle RelaxationMitochondria, MuscleRana temporariaUterine ContractionMuscle DenervationMyocardiumElectromyographyPsoas MusclesTime FactorsAnuraSatellite Cells, Skeletal MuscleMyosin Heavy ChainsBiomechanical PhenomenaMuscular DiseasesHindlimbMuscular AtrophyActinsRana pipiensRats, Sprague-DawleyMuscle SpindlesIsotonic ContractionMuscle CellsActin CytoskeletonRats, WistarSarcoplasmic ReticulumGuinea PigsModels, BiologicalMyocytes, Smooth MuscleHeartMuscle, StriatedQuadriceps MuscleDrug IndustryPapillary MusclesElasticityGlycogenMyosin Light ChainsKineticsDiaphragmTracheaCells, CulturedVasoconstrictionAdenosine TriphosphateStress, MechanicalPhysical ExertionMuscle WeaknessMyoblastsMuscle TonusPhosphorylationMotor NeuronsCaffeineActomyosinDose-Response Relationship, DrugSarcolemmaNeck MusclesOculomotor MusclesPotassium ChlorideRNA, MessengerSignal TransductionExerciseInsulinMuscular Dystrophy, AnimalRespiratory MusclesTroponin IAcetylcholineRyanodine Receptor Calcium Release ChannelNeuromuscular JunctionAbdominal MusclesMolecular Sequence DataPeristalsisGlucoseDogsMyoblasts, SkeletalProtein IsoformsEnergy MetabolismPhysical Conditioning, AnimalMice, Inbred C57BL