MitochondriaMuscle, SkeletalMusclesMitochondria, LiverMitochondria, MuscleMuscle ProteinsMuscle ContractionMuscle Fibers, SkeletalMitochondria, HeartMuscle, SmoothMuscle Fibers, Fast-TwitchMuscle DevelopmentMuscle, Smooth, VascularAbdomen, AcuteMuscle Fibers, Slow-TwitchMuscle FatigueElectromyographyMitochondrial ProteinsHindlimbMuscular AtrophyOxygen ConsumptionIsometric ContractionMuscle SpindlesOxidative PhosphorylationAnkle JointTendonsRats, WistarMitochondrial SwellingMotor NeuronsRats, Sprague-DawleyLegMyocytes, Smooth MuscleHindlimb SuspensionMitochondrial MembranesElectric StimulationTime FactorsAdenosine TriphosphateCell RespirationBiomechanical PhenomenaMuscle RelaxationMuscle WeaknessGlycogenIntracellular MembranesCalciumOculomotor MusclesQuadriceps MuscleNeck MusclesMuscle, StriatedCatsElectron Transport Complex IVPhysical Conditioning, AnimalMyofibrilsCitrate (si)-SynthaseDNA, MitochondrialEnergy MetabolismPhysical ExertionOxidation-ReductionKineticsPapillary MusclesRespiratory MusclesAnkleMuscle Stretching ExercisesEquinus DeformityMicroscopy, ElectronMuscular DiseasesUncoupling AgentsMembrane Potential, MitochondrialCytochromes cMyosin Heavy ChainsMitochondrial Membrane Transport ProteinsAbdominal MusclesMuscle CellsOrgan SizeMyostatinCells, CulturedPhosphocreatineRats, Inbred StrainsRunningSatellite Cells, Skeletal MuscleApoptosisRNA, MessengerReactive Oxygen SpeciesLocomotionOligomycinsModels, BiologicalMyocardiumMasseter MuscleRabbitsMalatesMolecular Sequence DataAgingMembrane PotentialsBody WeightFacial MusclesAchilles TendonMasticatory MusclesSuccinate DehydrogenaseBiological TransportPhysical EnduranceIntercostal Muscles