教育精品：一堂有趣的英语课.ppt

肥胖（肥胖（obesity obesity）Preview questionsContents(内容内容)The causes for obesityThe effects of obesityThe body mass index Prevention and treatmentPreview questionsDo you concern about your weight?What do you think of fat?Is it good or not?Do you want to lose weight?I am so fat!Thecausesforobesity:obesitytoo many high-fat/too many high-fat/high-calorie foodhigh-calorie foodlack of exerciselack of exerciseType 2 diabetesType 2 diabetesTheeffectsofobesity:shorterlifespanObesityPsychologicalproblemsnegativeself-imagelowself-esteemeatingdiseases,bullying,depression,feelingoflonelinessandnervousnessThe body mass index(BMI)It is worked out by dividing a persons It is worked out by dividing a persons weight in kilograms by their height in weight in kilograms by their height in meters squared.meters squared.For example:For example:My BMI:45/1.62=17.58my heightmy BMImy weight BMI:Body Mass Index(BMI)guide for people aged 18 and overBMI(kg/m)Less than 20UnderweightOver 20 to 25Desirable or healthy rangeOver 25 to 30OverweightOver 30 to 35Obese(class 1）Over 35 to 40Obese(class 2)Over 40Severely obese(class3)Prevention 1.Keep a healthy balanced diet 2.Regular exerciseTreatment1.Losing weight2.Being more active3.Walking4.SportsConclusion1.Obesity is a serious problem2.The ways to prevent and treat obesity