title: [Control the increasing of the prevalence of overweight and obesity by covering the energy gap of Chinese population].
abstract: OBJECTIVE
  To estimate the quantity of the excess energy accumulation according to the weight change in a follow up population. Confirm the energy gap and give the quantitative goal for how much change in energy balance is needed.
  
  
  METHODS
  This paper was based on data collected in the China Health and Nutrition Survey. We selected the adults, 20-45 years old healthy men and women, who took part in the survey in 1989 and were followed up in 2000.
  
  
  CONCLUSIONS
  From 1989 to 2000, the weight average of this population increased from 55.4 kg to 59.1 kg. The medium of the increasing rate was 0.33 kg/y. The prevalence of overweight has increased dramatically from 9.0% to 23.2% from 1989 to 2000. Assuming that each kilogram of body weight gained represents 32284.6 kJ. We estimated that the medium of the excess energy accumulation was 29.3 kJ/d and the 90th percentile was 94.2 kJ/d. Moreover energy derived from mixed composition diets is stored with an efficiency of at least 50% for nearly everyone. So we can estimated the energy gap should be 188.3 kJ/d. This estimate suggests that the behavior change needed to close the energy gap may be small and achievable without drastically altering current life-styles. For example, intaking 2%-3% less of the energy everyday or walk 10 minutes could offset weight gain in about 90% of the population.
authors.affiliation: Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
authors.forename: Feng-Ying
authors.initials: FY
authors.lastname: Zhai
authors.forename: Hui-Jun
authors.initials: HJ
authors.lastname: Wang
authors.forename: Zhi-Hong
authors.initials: ZH
authors.lastname: Wang
authors.forename: Chun-Ming
authors.initials: CM
authors.lastname: Chen
mesh_terms: D000328:Adult; D002681:China / Q000453:epidemiology; D002149:Energy Intake; D005260:Female; D006306:Health Surveys; D006801:Humans; D008019:Life Style; D008297:Male; D008875:Middle Aged; D009749:Nutrition Surveys; D009765:Obesity / Q000453:epidemiology / Q000517:prevention & control*; D050177:Overweight / Q000453:epidemiology / Q000517:prevention & control*; D015995:Prevalence; D012494:Sampling Studies; D055815:Young Adult