Muscle ContractionMuscle, SkeletalMuscle Fibers, SkeletalIsometric ContractionMusclesSarcomeresMuscle ProteinsTroponin CTroponinMyosinsMuscle FatigueTropomyosinCalciumRabbitsElectric StimulationMyofibrilsMuscle, SmoothRegional Blood FlowPhysiologyMuscle DevelopmentMuscle, Smooth, VascularConnectinMuscle Fibers, Fast-TwitchMyocardial ContractionMuscle Fibers, Slow-TwitchMuscle RelaxationMitochondria, MuscleRana temporariaUterine ContractionMuscle DenervationMyocardiumElectromyographyPsoas MusclesTime FactorsAnuraSatellite Cells, Skeletal MuscleMyosin Heavy ChainsBiomechanical PhenomenaMuscular DiseasesHindlimbActinsMuscular AtrophyRats, Sprague-DawleyRana pipiensMuscle SpindlesModels, BiologicalIsotonic ContractionRats, WistarActin CytoskeletonMuscle CellsSarcoplasmic ReticulumHeartGuinea PigsMuscle, StriatedMyocytes, Smooth MuscleQuadriceps MuscleCells, CulturedPapillary MusclesKineticsGlycogenElasticityAdenosine TriphosphateMyosin Light ChainsDiaphragmTracheaVasoconstrictionStress, MechanicalPhysical ExertionSignal TransductionMuscle WeaknessMyoblastsPhosphorylationRNA, MessengerMotor NeuronsMuscle TonusDose-Response Relationship, DrugCaffeineActomyosinSarcolemmaOculomotor MusclesNeck MusclesMolecular Sequence DataPotassium ChlorideInsulinExerciseMuscular Dystrophy, AnimalGlucoseEnergy MetabolismRespiratory MusclesAcetylcholineTroponin IRyanodine Receptor Calcium Release ChannelNeuromuscular JunctionPeristalsisDogsAbdominal MusclesMice, Inbred C57BLProtein IsoformsOxygen ConsumptionMyoblasts, Skeletal