Muscle, SkeletalMuscle ContractionMusclesMuscle Fibers, SkeletalIsometric ContractionMuscle ProteinsMuscle FatigueTroponin CTroponinMyosinsMuscle, SmoothTropomyosinElectric StimulationRabbitsMuscle Fibers, Fast-TwitchCalciumMuscle DevelopmentMuscle Fibers, Slow-TwitchMuscle DenervationMuscle, Smooth, VascularMitochondria, MuscleMuscular AtrophyRegional Blood FlowHindlimbElectromyographyMyofibrilsPhysical Conditioning, AnimalActinsMuscle RelaxationMuscle SpindlesRats, WistarGlycogenMotor NeuronsRats, Sprague-DawleyActin CytoskeletonHindlimb SuspensionBiomechanical PhenomenaPhysical ExertionTime FactorsTendonsMuscular DiseasesMyosin Heavy ChainsLegMuscle, StriatedCatsSatellite Cells, Skeletal MuscleAnkle JointMyostatinPhosphocreatineMyocytes, Smooth MuscleSarcomeresQuadriceps MuscleMuscle WeaknessOrgan SizeMyocardial ContractionPhysical EnduranceAdenosine TriphosphateMuscle CellsNeck MusclesOculomotor MusclesInsulinBody WeightRNA, MessengerMyocardiumOxygen ConsumptionPapillary MusclesUterine ContractionRunningMusculoskeletal Physiological PhenomenaKineticsModels, BiologicalIntermediate Filament ProteinsTorqueRespiratory MusclesCachexiaMyoblastsCells, CulturedAgingNeuromuscular JunctionEnergy MetabolismCitrate (si)-SynthasePhosphorylationAbdominal MusclesMuscular Dystrophy, AnimalDiaphragmHypertrophyMice, Inbred C57BLCytoskeletonLocomotionExerciseGlucoseStress, MechanicalSarcolemmaSignal TransductionPsoas MusclesMice, Inbred mdxGlucose Transporter Type 4Recruitment, NeurophysiologicalDose-Response Relationship, DrugAdaptation, Physiological