Chen Yue, Mao Yang
Department of Epidemiology and Community Medicine, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H 8M5.
Prev Med. 2006 Apr;42(4):261-5. doi: 10.1016/j.ypmed.2006.01.006. Epub 2006 Feb 14.
The association between physical activity and obesity are age and sex related.
The analysis was based on data from 81,512 Canadians aged 20 to 64 years who participated in the Canadian Community Health Survey conducted in 2000-01. Information collected included body mass index (BMI:<25.0 kg/m(2) (normal weight); 25.0-29.9 kg/m(2) (overweight); and 30.0+ kg/m(2) (obese)) and energy expenditure (EE) calculated based on the frequency and duration of leisure time physical activity (LTPA) and its value of metabolic energy cost.
Obese men and both obese and overweight women had lower EE values compared with those with normal weight. Overweight men 30 to 49 years of age were more active than men with normal weight. Average EE values decreased with age. Overall, 53.2% of men and 57.1% of women were inactive (EE<1.5 kcal/kg/day). In obese men and women, the corresponding prevalences were 59.7% and 71.4%, respectively. The prevalence of physical inactivity increased with increasing BMI in women and there was no "dose-effect" relationship in men.
Obese Canadians are less active, but overweight men tend to be more active than those with normal weight. The variation in the associations across age and sex groups suggests that intervention program development should take age and sex into consideration.
身体活动与肥胖之间的关联与年龄和性别有关。
分析基于2000 - 2001年参与加拿大社区健康调查的81512名20至64岁加拿大人的数据。收集的信息包括体重指数（BMI：<25.0 kg/m²（正常体重）；25.0 - 29.9 kg/m²（超重）；以及30.0+ kg/m²（肥胖））和根据休闲时间身体活动（LTPA）的频率和持续时间及其代谢能量成本值计算得出的能量消耗（EE）。
与正常体重者相比，肥胖男性以及肥胖和超重女性的EE值较低。30至49岁的超重男性比正常体重男性更活跃。平均EE值随年龄下降。总体而言，53.2%的男性和57.1%的女性不活跃（EE<1.5千卡/千克/天）。在肥胖男性和女性中，相应的患病率分别为59.7%和71.4%。女性中身体不活动的患病率随BMI增加而上升，男性中不存在“剂量效应”关系。
肥胖的加拿大人活动较少，但超重男性往往比正常体重者更活跃。各年龄和性别组之间关联的差异表明，干预项目的制定应考虑年龄和性别因素。
