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1Thedefinition.2Currentsituation.3Thecauses.4Theadverseeffects.5Howcanoverweightandobesitybereduced?Overweightandobesityaredefinedasabnormalorexcessivefataccumulationthatpresentsarisktohealth.TheWHOstandard:ApersonwithaBMIof30ormoreisgenerallyconsideredobese.ApersonwithaBMIequaltoormorethan25isconsideredoverweight.BMI分类WHO标准亚洲标准中国参考标准偏瘦18.518.518.5正常18.5～24.918.5～22.918.5～23.9超重≥25≥23≥24偏胖25.0～29.923～24.924～26.9肥胖30.0～34.925～29.927～29.9重度肥胖35.0～39.9≥30≥30极重度肥胖≥40.0.•Worldwideobesityhasmorethandoubledsince1980.•In2008,1.5billionadults,20andolder,wereoverweight.Oftheseover200millionmenandnearly300millionwomenwereobese.•65%oftheworld'spopulationliveincountrieswhereoverweightandobesitykillsmorepeoplethanunderweight.•Nearly43millionchildrenundertheageoffivewereoverweightin2010.ChinaAreportwarnsthatobesityrateswilldoubleby2028ifthewefailstotakeaction.Thefundamentalcauseofobesityandoverweightisanenergyimbalancebetweencaloriesconsumedandcaloriesexpended;Twomainreasons:1Anincreasedintakeofenergy-densefoods2AdecreaseinphysicalactivityTopersonalityHealthyriskQualityoflifeTosomecountryFacingadoubleburdenofdiseaseRaisedBMIisamajorriskfactorfornoncommunicablediseasesManylow-andmiddle-incomecountriesarenowfacingadoubleburdenofdisease.Whiletheycontinuetodealwiththeproblemsofinfectiousdiseaseandunder-nutrition,theyareexperiencingarapidupsurgeinnocommunicablediseaseriskfactorssuchasobesityandoverweight,particularlyinurbansettings.infectiousdiseaseobesityandoverweightIndividuals‘effortIndividualeffort1.limitenergyintakefromtotalfats;2.increaseconsumptionoffruitandvegetables,aswellaslegumes,wholegrainsandnuts;3.limittheintakeofsugars;4.engageinregularphysicalactivity;5.achieveenergybalance