SarcomeresMuscle ContractionMuscle, SkeletalCardiac MyosinsCardiomyopathy, Hypertrophic, FamilialMuscle Fibers, SkeletalIsometric ContractionMusclesMuscle ProteinsTroponin CMyocardiumTroponinMyosinsMuscle FatigueTropomyosinCalciumRabbitsElectric StimulationMyofibrilsMuscle, SmoothRegional Blood FlowMyocardial ContractionMuscle DevelopmentConnectinMyocytes, CardiacMuscle, Smooth, VascularMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchHeartMuscle RelaxationMitochondria, MuscleRana temporariaTime FactorsMuscle DenervationMyosin Heavy ChainsUterine ContractionElectromyographyPsoas MusclesRats, Sprague-DawleyAnuraSatellite Cells, Skeletal MuscleBiomechanical PhenomenaMuscular DiseasesHindlimbActinsRats, WistarCardiac OutputMuscle CellsMuscular AtrophyActin CytoskeletonRana pipiensMuscle SpindlesCells, CulturedGuinea PigsIsotonic ContractionPapillary MusclesModels, BiologicalSarcoplasmic ReticulumTroponin IKineticsMyocytes, Smooth MuscleMuscle, StriatedMyosin Light ChainsAdenosine TriphosphateElasticityQuadriceps MusclePhysical ExertionGlycogenSarcolemmaStress, MechanicalDogsVasoconstrictionDiaphragmTracheaPhosphorylationSignal TransductionTroponin TRNA, MessengerDose-Response Relationship, DrugHeart VentriclesMuscle WeaknessMyoblastsRyanodine Receptor Calcium Release ChannelCaffeineArrhythmias, CardiacMuscle TonusActomyosinMice, Inbred C57BLMotor NeuronsExerciseMolecular Sequence DataPotassium ChlorideOxygen ConsumptionInsulinOculomotor MusclesNeck MusclesCardiac Surgical ProceduresMuscular Dystrophy, AnimalAcetylcholineRespiratory Muscles