Body CompositionMuscle, SkeletalMusclesMuscle ProteinsMuscular AtrophySarcopeniaMuscle Fibers, SkeletalMuscle, SmoothMyostatinMuscle DevelopmentMuscle ContractionMuscle, Smooth, VascularMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMuscle DenervationMuscle FatigueMuscle WeaknessOrgan SizeMitochondria, MuscleMuscle StrengthMass SpectrometryQuadriceps MuscleBody WeightBody Mass IndexAgingNeck MusclesAbsorptiometry, PhotonMyocytes, Smooth MuscleAdipose TissueIsometric ContractionThinnessHindlimb SuspensionObesityOculomotor MusclesHypertrophyMuscular Disorders, AtrophicRespiratory MusclesSatellite Cells, Skeletal MuscleMuscle, StriatedMuscle SpindlesMuscle RelaxationMuscular DiseasesMuscle CellsExercisePapillary MusclesCachexiaPectoralis MusclesHindlimbMasseter MuscleIntercostal MusclesThighAbdominal MusclesLegTime FactorsEnergy MetabolismElectromyographyMyosin Heavy ChainsMasticatory MusclesFacial MusclesTemporal MuscleInsulinBiomechanical PhenomenaAnthropometryPhysical EnduranceMyofibrilsOxygen ConsumptionHand StrengthMyoblastsResistance TrainingPhysical ExertionMice, Inbred C57BLMuscular Dystrophy, AnimalWeight LiftingSKP Cullin F-Box Protein LigasesRNA, MessengerInsulin-Like Growth Factor IGlycogenMyoD ProteinCells, CulturedImmobilizationMeatDiaphragmRats, Sprague-DawleyAnabolic AgentsSpectrometry, Mass, Electrospray IonizationTandem Mass SpectrometrySignal TransductionElectric StimulationMuscle Strength DynamometerInsulin ResistancePotassium RadioisotopesRegenerationRats, WistarMyoblasts, SkeletalMyogeninPsoas MusclesAdaptation, PhysiologicalBlood GlucoseFollistatinModels, Biological