Chapter9 Energyand Weight

1、Energy Balance and Weight ManagementEnergy balancepEnergy balance is the relationship between energy intake and energy output.nEnergy output is the energy you use primarily for basic body functions, physical activity and the processing of food.nEnergy intake is the amount of calories you take throug

2、h consumption of carbohydrate, protein, fat and alcohol.Energy EquilibriumEnergy in = Energy out-little or no change in weight over timePositive Energy BalanceEnergy in Energy out-weight gainNegative Energy BalanceEnergy in 30nUnderweight: BMI 35 inches （88.9 cm2.7尺） nMen 40 inches （101.63.1尺）“Apple

3、” and “Pear” Body Shapes ComparedVisceral Fat and Subcutaneous FatAssessing Body FatnesspWomen = 20-25% Men = 12-20%nUnderwater (or hydrostatic) weighingnBodPodnSkinfold thickness皮褶厚度nBioelectrical Impedance Analysis-电阻抗分析nDEXA双重X射线分析Methods Used to Assess Body FatBioelectrical impedanceFatfold meas

4、uresAir displacementplethysmographyDual energy X-rayabsorptiometry (DEXA)HydrodensitometryWeight ManagementpWeight management is the adoption of healthful and sustainable eating and exercise behaviors indicated for reduced disease risk and improved feelings of energy and well-beingWeight Managementp

5、Perception of weightpSetting realistic goalspWeight management lifestylenDiet and eating habitspReduce total caloriespReduce fat caloriespIncrease complex carbohydratespImprove eating habitsnIncrease physical activitynStress managementnSelf-acceptanceUnderweightpDefinitionnBMI 18.5pCauses and assess

6、mentnIllnessnEating disordersnMetabolic factorspWeight-gain strategiesnSmall, frequent mealsnFluids between mealsnHigh-calorie foods and beveragesStudy questionspMary, female, ht=163cm,wt=59kg, calculate her BMI. Is she normal, overweight, obesity or underweight?pExplain the concept of energy balancepList and describe the th