Body Mass IndexBody CompositionMuscle, SkeletalObesityMusclesAbsorptiometry, PhotonSarcopeniaBody WeightThinnessMass SpectrometryAdipose TissueMuscle ProteinsRisk FactorsAnthropometryMuscular AtrophyMuscle Fibers, SkeletalOverweightCross-Sectional StudiesMuscle StrengthMyostatinMuscle, SmoothExerciseMuscle DevelopmentWeight LossProspective StudiesMuscle ContractionCohort StudiesBody HeightBone DensityAgingAdiposityRegression AnalysisOrgan SizeSex FactorsTime FactorsMuscle, Smooth, VascularAge FactorsWeight GainLinear ModelsBody ConstitutionBlood GlucoseMuscle WeaknessEnergy MetabolismCase-Control StudiesLongitudinal StudiesSkinfold ThicknessEnergy IntakeNutritional StatusFollow-Up StudiesInsulin ResistanceInsulinDietWaist CircumferenceBlood PressureMuscle Fibers, Fast-TwitchPrevalenceWaist-Hip RatioBiological MarkersLeptinMuscle Fibers, Slow-TwitchAnalysis of VarianceTandem Mass SpectrometryMuscle FatigueBody SizeMotor ActivitySpectrometry, Mass, Electrospray IonizationMuscle DenervationSex CharacteristicsQuestionnairesElectric ImpedanceReference ValuesObesity, MorbidQuadriceps MuscleSeverity of Illness IndexHypertensionMultivariate AnalysisDiabetes Mellitus, Type 2Mitochondria, MuscleLogistic ModelsEatingEuropean Continental Ancestry GroupHand StrengthUnited StatesPhysical FitnessPredictive Value of TestsSmokingTreatment OutcomeCardiovascular DiseasesRetrospective StudiesBasal MetabolismLegBody Fat DistributionPregnancyBody Weights and MeasuresAbdominal FatBody Fluid CompartmentsDiet, ReducingOxygen ConsumptionSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationWeight Lifting