Whole Body ImagingPlethysmography, Whole BodyWhole-Body CountingMuscle, SkeletalVibrationBody CompositionWhole-Body IrradiationEnergy MetabolismLeucineHeat Stress DisordersGlucoseAbsorptiometry, PhotonInsulinBody WeightAdipose TissueHyperthermia, InducedOxygen ConsumptionExerciseBody Temperature RegulationLiverBlood GlucoseBody TemperaturePhysical EnduranceRadiation DosageTime FactorsGlucose Clamp TechniqueFatty Acids, NonesterifiedTissue DistributionInsulin ResistanceRegional Blood FlowPotassium RadioisotopesProteinsCalorimetry, IndirectBone DensityLipid MetabolismLegRadiometryPhenylalanineKineticsGlycogenOxidation-ReductionNitrogenSkinRadiation Injuries, ExperimentalPositron-Emission TomographyMuscle ProteinsDietSplanchnic CirculationRadiation-Protective AgentsBody Fluid CompartmentsRadiopharmaceuticalsFastingSweatHomeostasisModels, BiologicalBed RestWeight LiftingMetabolic Clearance RateMice, Inbred C57BLMagnetic Resonance ImagingReference ValuesBody WaterBody BurdenHormonesHuman BodyIodine RadioisotopesDose-Response Relationship, RadiationNitrogen IsotopesRadioisotope Dilution TechniqueLipolysisSweatingRats, Sprague-DawleyGamma RaysPhysical ExertionObesityVisceraRotationAnalysis of VarianceSensitivity and SpecificityOrgan SizeAmino AcidsPlutoniumFluorodeoxyglucose F18GlycerolTooth SocketRheniumAgingHot TemperatureCarbon DioxidePostureCold TemperatureLactic AcidOrgan SpecificityBlood CirculationEatingReproducibility of ResultsDeuteriumDietary ProteinsElectric ImpedanceAlgorithms