Muscle, SkeletalMusclesMuscle ProteinsMuscle ContractionMuscle Fibers, SkeletalMuscle, SmoothMuscle Fibers, Fast-TwitchMuscle DevelopmentMuscle, Smooth, VascularMuscle DenervationMuscle Fibers, Slow-TwitchMuscle FatigueElectromyographyMitochondria, MuscleHindlimbMuscular AtrophyIsometric ContractionMuscle SpindlesAnkle JointTendonsLegMotor NeuronsHindlimb SuspensionMyocytes, Smooth MuscleBiomechanical PhenomenaElectric StimulationMuscle RelaxationMuscle WeaknessNeck MusclesGlycogenOculomotor MusclesQuadriceps MuscleCatsMuscle, StriatedPhysical Conditioning, AnimalRespiratory MusclesPhysical ExertionRats, Sprague-DawleyPapillary MusclesAnkleMuscle Stretching ExercisesEquinus DeformityRats, WistarTime FactorsMyosin Heavy ChainsMyofibrilsMyostatinMuscular DiseasesAbdominal MusclesRunningSatellite Cells, Skeletal MuscleMuscle CellsOrgan SizePhosphocreatineMasseter MuscleLocomotionFacial MusclesAchilles TendonMasticatory MusclesIntercostal MusclesTorquePhysical EnduranceBody WeightMusculoskeletal Physiological PhenomenaMotor Neurons, GammaDiaphragmMuscle SpasticityTarsus, AnimalCitrate (si)-SynthaseGaitTibial NerveNeuromuscular JunctionPectoralis MusclesOxygen ConsumptionKneeRabbitsRNA, MessengerAgingInsulinCachexiaImmobilizationAdaptation, PhysiologicalInjections, IntramuscularMuscular Dystrophy, AnimalRecruitment, NeurophysiologicalFootNeural ConductionEnergy MetabolismMuscular Disorders, AtrophicNeurons, AfferentHypertrophyPsoas MusclesPostureH-ReflexRegional Blood FlowCalciumCells, CulturedTemporal MuscleMuscle RigidityMice, Inbred mdx