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 MusclesAnuraSatellite Cells, Skeletal MuscleMyosin Heavy ChainsTime FactorsBiomechanical PhenomenaMuscular DiseasesHindlimbMuscular AtrophyActinsRana pipiensRats, Sprague-DawleyMuscle SpindlesIsotonic ContractionMuscle CellsActin CytoskeletonRats, WistarSarcoplasmic ReticulumGuinea PigsMyocytes, Smooth MuscleModels, BiologicalHeartMuscle, StriatedQuadriceps MusclePapillary MusclesElasticityGlycogenMyosin Light ChainsKineticsDiaphragmTracheaCells, CulturedVasoconstrictionAdenosine TriphosphateStress, MechanicalPhysical ExertionMuscle WeaknessMyoblastsMuscle TonusPhosphorylationMotor NeuronsCaffeineActomyosinSarcolemmaNeck MusclesOculomotor MusclesPotassium ChlorideDose-Response Relationship, DrugRNA, MessengerSignal TransductionInsulinMuscular Dystrophy, AnimalExerciseRespiratory MusclesTroponin IAcetylcholineRyanodine Receptor Calcium Release ChannelNeuromuscular JunctionAbdominal MusclesMolecular Sequence DataPeristalsisGlucoseDogsMyoblasts, SkeletalProtein IsoformsEnergy MetabolismPhysical Conditioning, AnimalMice, Inbred C57BLOxygen Consumption