Prospective associations between objective measures of physical activity and fat mass in 12-14 year old children: the Avon Longitudinal Study of Parents and Children (ALSPAC)
Prospective associations between objective measures of physical activity and fat mass in 12-14 year old children: the Avon Longitudinal Study of Parents and Children (ALSPAC)
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DOI：
10.1136/bmj.b4544
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发表时间：
2009-11-26
影响因子：
105.7
通讯作者：
Tilling, Kate
中科院分区：
文献类型：
--
作者：
Riddoch, Chris J.;Leary, Sam D.;Tilling, Kate
目的探讨12岁体力活动与14岁肥胖之间的关系。设计前瞻性出生队列研究，收集2003~2007年间英国埃文郡原14 541名孕妇1991~2年间的招募资料。其中，7159人参加，4150人(1964名男孩，2186名女孩)提供了关于暴露、结果和混杂变量的充分数据。主要结果测量14岁时的脂肪质量，通过双发射X射线吸收测量仪测量，与12岁时的体力活动相关。结果14岁时的脂肪质量(结果)与12岁时的体力活动(暴露)在总活动量(加速计计数/分钟)和每日中强度体力活动(分钟/天)方面都有很强的相关性。在12岁时，每天多做15分钟中等强度的体育活动与14岁时较低的脂肪质量有关，在男孩(11.9%，95%可信区间9.5%至14.3%)和女孩(9.8%(6.7%至12.8%))中。在两个年龄段的男孩和女孩中，由于中等强度的体力活动而进行的体力活动的比例在20%到30%之间。结论高水平的体力活动，特别是中等强度到高强度的活动，可能与青春期早期较低的脂肪量水平有关。在对抗肥胖的斗争中，提高儿童体力活动水平的干预措施可能很重要。
Objective To investigate associations between physical activity at age 12 and subsequent adiposity at age 14.Design Prospective birth cohort study with data collected between 2003 and 2007.Setting Original recruitment in 1991-2 of 14 541 pregnant women living in the former County of Avon (United Kingdom).Participants At age 12, 11 952 children were invited to attend the research clinic. Of these, 7159 attended, and 4150 (1964 boys, 2186 girls) provided sufficient data on exposure, outcome, and confounding variables.Main outcome measure Fat mass at age 14, measured by dual emission x ray absorptiometry, associated with physical activity at age 12, measured by accelerometry.Results Prospective associations of fat mass at age 14 (outcome) with physical activity at age 12 (exposure) were strong for both total activity (accelerometer counts/min) and for daily amount of moderate-vigorous physical activity (min/day). An extra 15 minutes of moderate-vigorous physical activity per day at age 12 was associated with lower fat mass at age 14 in boys (by 11.9% (95% confidence interval 9.5% to 14.3%)) and girls (by 9.8% (6.7% to 12.8%)). The proportion of physical activity due to moderate-vigorous physical activity was between 20% and 30% in boys and girls at the two ages.Conclusions Higher levels of physical activity, in particular activity of moderate to higher intensities, are prospectively associated with lower levels of fat mass in early adolescence. Interventions to raise levels of physical activity in children are likely to be important in the fight against obesity.