Muscle ContractionMuscle, SkeletalMyosinsMuscle Fibers, SkeletalMusclesIsometric ContractionTroponin CTroponinMuscle ProteinsMuscle FatigueTropomyosinRabbitsCalciumMuscle, SmoothMyosin Heavy ChainsElectric StimulationMyosin Light ChainsMyosin SubfragmentsRegional Blood FlowMyosin Type IIMuscle, Smooth, VascularMuscle DevelopmentMuscle Fibers, Fast-TwitchMyosin Type VMuscle Fibers, Slow-TwitchActinsMitochondria, MuscleMyofibrilsMuscle RelaxationMyocardial ContractionActomyosinUterine ContractionMyosin-Light-Chain KinaseMuscle DenervationElectromyographySatellite Cells, Skeletal MuscleCardiac MyosinsNonmuscle Myosin Type IIAMyosin Type INonmuscle Myosin Type IIBMuscular AtrophySarcomeresMuscular DiseasesHindlimbTime FactorsAdenosine TriphosphatePhosphorylationMuscle, StriatedSmooth Muscle MyosinsKineticsMyocardiumSkeletal Muscle MyosinsRats, WistarMuscle SpindlesMyocytes, Smooth MuscleRats, Sprague-DawleyChickensMuscle CellsQuadriceps MuscleTracheaGuinea PigsActin CytoskeletonVasoconstrictionGlycogenPotassium ChlorideMyosin-Light-Chain PhosphataseCells, CulturedBiomechanical PhenomenaSarcoplasmic ReticulumPhysical ExertionMuscle WeaknessModels, BiologicalDiaphragmMolecular Sequence DataMyoblastsAdenosine TriphosphatasesOculomotor Musclesrho-Associated KinasesPapillary MusclesRNA, MessengerPsoas MusclesIsotonic ContractionMotor NeuronsGizzardDose-Response Relationship, DrugAmino Acid SequenceProtein IsoformsNeck MusclesSignal TransductionInsulinExerciseCa(2+) Mg(2+)-ATPaseAcetylcholineRespiratory MusclesNeuromuscular JunctionAbdominal MusclesMyoblasts, SkeletalGlucoseDogsCaffeine