SarcopeniaSatellite Cells, Skeletal MuscleDNA, SatellitePAX7 Transcription FactorSatellite Cells, PerineuronalMuscle, SkeletalRNA, SatelliteMuscle DevelopmentMuscular AtrophyRegenerationMyoD ProteinMuscle Fibers, SkeletalSatellite CommunicationsAgingSatellite VirusesMyoblastsMyostatinMyogenic Regulatory Factor 5MyogeninCardiotoxinsMuscular DiseasesMuscle StrengthCell DifferentiationMuscle WeaknessHand StrengthIndependent LivingSatellite ImageryMice, Inbred mdxMuscle ProteinsFrail ElderlyMuscle Fibers, Fast-TwitchHospitals, SatelliteCells, CulturedCobra Cardiotoxin ProteinsSpacecraftCell ProliferationMyogenic Regulatory FactorsCucumber Mosaic Virus SatelliteMyoblasts, SkeletalHypertrophyBody CompositionMusclesStem CellsMuscle Fibers, Slow-TwitchMuscular Disorders, AtrophicCachexiaMice, Inbred C57BLMuscular DystrophiesElder Nutritional Physiological PhenomenaWasting SyndromeOrgan SizeMuscle DenervationMuscular Dystrophy, AnimalSyndecan-3Geriatric AssessmentResistance TrainingPaired Box Transcription FactorsCell LineageAbsorptiometry, PhotonCaloric RestrictionHindlimb SuspensionQuadriceps MuscleDesminMobility LimitationAging, Premature