SarcopeniaMuscular AtrophyAgingMuscle, SkeletalMuscle StrengthMuscle WeaknessHand StrengthIndependent LivingFrail ElderlyBody CompositionMuscular Disorders, AtrophicCachexiaElder Nutritional Physiological PhenomenaMuscular DiseasesWasting SyndromeGeriatric AssessmentAbsorptiometry, PhotonCaloric RestrictionMobility LimitationAging, Premature