Muscle, SkeletalMuscle ContractionMuscle Fibers, SkeletalMusclesMuscle ProteinsIsometric ContractionMuscle FatigueTroponin CTroponinMuscle, SmoothMyosinsRabbitsCalciumTropomyosinMuscle DevelopmentElectric StimulationMitochondria, MuscleMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMuscle, Smooth, VascularRegional Blood FlowSatellite Cells, Skeletal MuscleExerciseGlycogenMuscular AtrophyMuscle DenervationQuadriceps MuscleMuscular DiseasesMyofibrilsMuscle CellsMuscle RelaxationPhysical ExertionInsulinMyosin Heavy ChainsPhysical EnduranceMyoblastsElectromyographyPhosphocreatineTime FactorsHindlimbRNA, MessengerOxygen ConsumptionGlucoseLegMyocytes, Smooth MuscleMuscle, StriatedMuscle SpindlesMyoblasts, SkeletalCells, CulturedCitrate (si)-SynthaseMuscle WeaknessSarcoplasmic ReticulumAdenosine TriphosphateSarcolemmaRats, WistarLactic AcidPhosphorylationOculomotor MusclesMyostatinGlucose Transporter Type 4Myocardial ContractionMyocardiumActinsNeck MusclesRats, Sprague-DawleySignal TransductionKineticsSarcomeresMyoD ProteinEnergy MetabolismGene Expression RegulationPapillary MusclesUterine ContractionRespiratory MusclesCreatine KinaseAMP-Activated Protein KinasesDiaphragmRegenerationAbdominal MusclesMolecular Sequence DataModels, BiologicalMuscular Dystrophy, AnimalAgingThighAdaptation, PhysiologicalMotor NeuronsVasoconstrictionPsoas MusclesPhysical Conditioning, AnimalMice, Inbred C57BLRyanodine Receptor Calcium Release ChannelMice, Inbred mdxDystrophinInsulin ResistanceBiomechanical PhenomenaBiopsyMuscular DystrophiesCaffeineNeuromuscular JunctionRest