身体活动与青少年肥胖风险的“剂量-效应”关系  

"Dose-Response" Relation between Physical Activity and Obesity Risk in Youth

作　　者：关尚一[1] 朱为模[2] 

机构地区：[1]广州医科大学基础学院,广东广州510182 [2]伊利诺伊大学运动科学与社区保健系,美国伊利诺伊厄本那61801

出　　处：《上海体育学院学报》2013年第4期68-72,共5页Journal of Shanghai University of Sport

基　　金：广州市教育科学"十二五"规划课题(11A064);广州医科大学博士;留学归国人员基金项目(2011C52)

摘　　要：目的:阐明客观性测量方法测量的中高强度身体活动量与青少年肥胖风险之间的"剂量-效应"关系,确定预防青少年肥胖的身体活动推荐量。方法:测量美国青少年受试者的身高、体重以及膳食摄入情况等,并用Actigraph加速度计测定受试者连续7 d的身体活动水平;采用Fractional polynomial回归模型分析中高强度身体活动量与肥胖风险的关系,并拟合出它们之间的"剂量-效应"关系曲线。结果:青少年肥胖风险随着中高强度身体活动量的增加而呈曲线下降的趋势;每天15 min中高强度身体活动患肥胖的风险比是每天1 min中高强度身体活动的0.46,而每天30 min、45 min和60 min中高强度身体活动对应的风险比分别为0.20、0.13和0.10。结论:中高强度身体活动量与青少年肥胖风险之间存在着"剂量-效应"关系。Objective： it is to describe the dose-response relation between moderate-to-strong physical activity （MVPA） and obesity risk in youth. It can help to understand the optimal amounts of physical activity needed to reduce the risk of obesity in youth. Methods ： Height, weight, and dietary supplements were measured among American youth. Physical Education （PA） was measured using Actigraph accelerometers over 7 days. Fractional polynomial regression modeling was used to fit the dose-response curves between MVPA and obesity risk in youth. Results： The likelihood of obesity decreased in a curvilinear manner with increasing minutes of MVPA. At 15,30, 35 and 60 min/d of MVPA the risk ratios for obesity were 0. 46, 0. 20, 0. 13, and 0. 10, respectively, in comparison to 1 minute of MVPA. Conclusion ： A modest dose-response relation was observed between MVPA and obesity in youth.

关 键 词：青少年 身体活动 肥胖风险 "剂量-效应"关系 

分 类 号：G804.2[文化科学—运动人体科学]