Muscle ContractionMuscle, SkeletalMuscle Fibers, SkeletalIsometric ContractionMusclesTroponin CTroponinMuscle ProteinsMuscle FatigueMyosinsTropomyosinCalciumRabbitsElectric StimulationMuscle, SmoothDietary SupplementsRegional Blood FlowEnergy MetabolismOxidation-ReductionOxygen ConsumptionMuscle, Smooth, VascularMuscle DevelopmentMitochondria, MuscleMuscle Fibers, Fast-TwitchGlucoseMuscle Fibers, Slow-TwitchTime FactorsMyocardial ContractionMuscle RelaxationLipid MetabolismRats, Sprague-DawleyUterine ContractionRats, WistarMyocardiumOxygenMuscle DenervationElectromyographyKineticsSatellite Cells, Skeletal MuscleLactic AcidMyofibrilsAdenosine TriphosphateCells, CulturedDose-Response Relationship, DrugMuscular AtrophyInsulinGlycolysisHindlimbPhosphocreatineMuscular DiseasesGlycogenModels, BiologicalOxidative PhosphorylationPhysical ExertionRNA, MessengerLiverExerciseGuinea PigsMice, Inbred C57BLMuscle SpindlesAcetatesDogsMuscle CellsQuadriceps MuscleMyocytes, Smooth MuscleSignal TransductionMitochondriaMuscle, StriatedSarcomeresMicrosomes, LiverBiotransformationActinsVasoconstrictionTracheaPhysical Conditioning, AnimalAgingPhosphorylationCytochrome P-450 Enzyme SystemSarcoplasmic ReticulumHeartFatty AcidsMolecular Sequence DataMyoblastsMuscle WeaknessMyosin Heavy ChainsBody WeightGene Expression RegulationCarbon RadioisotopesPotassium ChlorideDiaphragmBiomechanical PhenomenaRats, Inbred StrainsMyosin Light ChainsCitrate (si)-SynthasePapillary MusclesMotor NeuronsEnzyme InhibitorsNeck MusclesOculomotor MusclesMagnetic Resonance Spectroscopy