Muscle ContractionMuscle, SkeletalMuscle Fibers, SkeletalIsometric ContractionMusclesTroponin CTroponinMuscle ProteinsMyosinsMuscle FatigueTropomyosinCalciumRabbitsElectric StimulationMuscle, SmoothRegional Blood FlowMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMuscle, Smooth, VascularMuscle DevelopmentMitochondria, MuscleNerve FibersMuscle RelaxationMyocardial ContractionMyofibrilsMuscle DenervationElectromyographyUterine ContractionTime FactorsSatellite Cells, Skeletal MuscleMuscular AtrophyHindlimbMuscular DiseasesMuscle SpindlesRats, Sprague-DawleyRats, WistarSarcomeresDietary FiberMyosin Heavy ChainsGuinea PigsActinsQuadriceps MuscleMuscle, StriatedMyocytes, Smooth MuscleGlycogenMuscle CellsSarcoplasmic ReticulumMotor NeuronsBiomechanical PhenomenaTracheaDiaphragmPhysical ExertionVasoconstrictionCells, CulturedMuscle WeaknessMyocardiumModels, BiologicalKineticsMyoblastsMyosin Light ChainsOculomotor MusclesAdenosine TriphosphateIsotonic ContractionNeuromuscular JunctionDose-Response Relationship, DrugPapillary MusclesNeck MusclesGene FrequencyPotassium ChlorideRNA, MessengerCatsExercisePsoas MusclesAcetylcholineInsulinMolecular Sequence DataCaffeinePhosphorylationMembrane PotentialsAction PotentialsRespiratory MusclesSignal TransductionSarcolemmaAbdominal MusclesMuscular Dystrophy, AnimalPeristalsisMice, Inbred C57BLGlucoseDogsRyanodine Receptor Calcium Release ChannelRana temporariaActomyosinOxygen ConsumptionMyoblasts, SkeletalPhysical Conditioning, AnimalPhysical EnduranceStress, MechanicalPhosphocreatineAgingEnergy Metabolism