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首页> 外文期刊>Medicine and science in sports and exercise >Relationship between physical activity and the development of body mass index in children
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Relationship between physical activity and the development of body mass index in children

机译：儿童体育锻炼与体重指数发展的关系

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PURPOSE: Studies estimating the contribution of physical activity (PA) to the development of body mass index (BMI) in critical periods of childhood are warranted. Therefore, we have prospectively investigated this relationship in boys and girls of the KOALA Birth Cohort study, the Netherlands, in the period around adiposity rebound (i.e., 4-9 yr old). METHODS: PA was assessed in 470 children (231 boys, 239 girls) using accelerometers at the ages of 5 and 7 yr, and height and weight were measured at 5, 7, and 9 yr. BMI z-scores were calculated to standardize for age and sex. Leaner and heavier children were classified according to the 25th and 75th percentile of our study sample. To examine longitudinal relationships between PA and BMI z-scores, generalized estimating equation analyses were performed and stratified for sex and baseline weight status (leaner, normal weight, and heavier children). RESULTS: In heavier children, an increment of 6.5 min of moderate to vigorous PA (MVPA) was related to a subsequent decrease of 0.03 BMI z-scores both in boys (95% confidence interval = -0.07 to -0.001) and girls (95% confidence interval = -0.05 to -0.002). Light PA was also associated with a decrease of BMI in heavier boys but not girls. In normal weight children, MVPA was associated with decrease of BMI in boys but not girls. CONCLUSION: Increments of MVPA were associated with decreases in BMI z-score in heavier children, both boys and girls. Promoting MVPA should remain a major prevention vehicle for improving body composition in 4- to 9-yr-old children.
机译：目的：有必要进行估计运动量（PA）对儿童期关键时期身体质量指数（BMI）发展的贡献的研究。因此，我们前瞻性地研究了荷兰KOALA出生队列研究中男孩和女孩在肥胖反弹（即4-9岁）前后的这种关系。方法：使用加速度计在5岁和7岁时对470名儿童（231名男孩，239名女孩）的PA进行了评估，并在5、7和9岁时测量了身高和体重。计算BMI z得分以标准化年龄和性别。较瘦和较重的孩子根据我们研究样本的第25和第75个百分位数进行分类。为了检查PA和BMI z得分之间的纵向关系，进行了广义估计方程分析，并对性别和基线体重状况（较轻，正常体重和较重的孩子）进行了分层。结果：在较重的儿童中，中度至剧烈PA（MVPA）增加6.5分钟与男孩（95％置信区间= -0.07至-0.001）和女孩（95）的BMI z分数随后降低0.03有关。 ％置信区间= -0.05到-0.002）。体重较轻的男孩中，轻型PA也与BMI降低有关，而女孩中没有。在体重正常的儿童中，MVPA与男孩而非女孩的BMI降低有关。结论：MVPA的增加与体重增加的男孩和女孩的BMI z分数降低有关。促进MVPA应该仍然是改善4至9岁儿童身体成分的主要预防手段。

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