Hindlimb SuspensionMuscle, SkeletalMyostatinMuscle DevelopmentHindlimbMuscular AtrophyMuscle Fibers, SkeletalSatellite Cells, Skeletal MuscleMuscle ProteinsMusclesMyoblastsMuscle Fibers, Fast-TwitchRigor MortisMuscle Fibers, Slow-TwitchOrgan SizeHypertrophyMyosin Heavy ChainsWeightlessness SimulationWeight-BearingMuscle ContractionSuspensionsRegenerationActivin Receptors, Type IIInsulin-Like Growth Factor IRats, Sprague-DawleyAdaptation, PhysiologicalRats, WistarCell DifferentiationSignal TransductionAtrophyMuscle, SmoothMice, KnockoutMuscle DenervationBody WeightTransforming Growth Factor betaMice, Inbred C57BLTime FactorsRNA, MessengerMuscle, Smooth, VascularGene Expression RegulationMitochondria, MuscleMuscular DiseasesMuscle FatigueMyoD ProteinMyoblasts, SkeletalMyofibrilsPAX7 Transcription FactorMyogeninCells, CulturedRabbitsPhysical Conditioning, AnimalMyocytes, Smooth MuscleCreatine Kinase, MM FormIschemiaFollistatinInsulinIsometric ContractionPectoralis MusclesMuscle CellsClenbuterolGlycogenMice, Inbred mdxQuadriceps MuscleMuscle WeaknessCalciumMuscle, StriatedExtremitiesForelimbElectric StimulationMyogenic Regulatory FactorsMuscle SpindlesOculomotor MusclesMuscle RelaxationRegional Blood FlowAgingElectromyographyGene Expression Regulation, DevelopmentalMuscular DystrophiesNeck MusclesGlucosePhysical ExertionSKP Cullin F-Box Protein LigasesMyogenic Regulatory Factor 5