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首页> 外文期刊>International Journal of Environmental Research and Public Health >Relationship between Sedentariness and Moderate-to-Vigorous Physical Activity in Youth: A Multivariate Multilevel Study
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Relationship between Sedentariness and Moderate-to-Vigorous Physical Activity in Youth: A Multivariate Multilevel Study

机译：久坐感与青少年中度至剧烈运动之间的关系：多元多层次研究

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This study aimed to jointly analyse moderate-to-vigorous physical activity (MVPA) and sedentariness, and their correlates, in children within their school contexts, using a multivariate multilevel approach. The sample comprises 499 Portuguese children (284 girls) from 23 schools. MVPA and sedentary time were estimated by accelerometer. A set of predictor variables from both child and school levels was tested. Overall, schools explained a small amount of the total variance in both MVPA (5.6%) and sedentariness (3.2%), and a correlation coefficient of ?0.45 ( p < 0.05) was found between MVPA and sedentariness at the child level. Number of siblings and socioeconomic status (SES) were significantly associated with both sedentariness (SES: β = 2.372 ± 1.183; siblings: β = ?8.127 ± 2.759) and MPVA (SES: β = ?1.535 ± 0.421; siblings: β = 2.822 ± 0.977), but with opposite signs. Body Mass Index (BMI) ( β = ?4.804 ± 1.898) and sex (male) ( β = 21.561 ± 3.496) were only associated with MVPA. None of the school correlates were statistically significant in their joint effects to simultaneously explain sedentariness and MVPA. These results suggest that although MVPA and sedentariness may be different constructs, they are correlated and this should be taken into account when designing strategies to reduce children’s sedentariness and increase their MVPA. In addition, the small effect of the school context on this relationship highlights the important roles of child and family characteristics.
机译：这项研究旨在使用多元多层次方法，对学校环境中儿童的中度至剧烈体力活动（MVPA）和久坐不动及其相关性进行分析。样本包括来自23所学校的499名葡萄牙儿童（284名女孩）。 MVPA和久坐时间通过加速度计估算。对来自儿童和学校水平的一组预测变量进行了测试。总体而言，学校解释了MVPA和久坐感（3.2％）的总差异很小，在儿童水平上MVPA和久坐感之间的相关系数约为0.45（p <0.05）。兄弟姐妹数量和社会经济地位（SES）与久坐感（SES：β= 2.372±1.183;兄弟姐妹：β=α8.127±2.759）和MPVA（SES：β=α1.535±0.421;兄弟姐妹：β= 2.822 ±0.977），但符号相反。身体质量指数（BMI）（β=？4.804±1.898）和性别（男性）（β= 21.561±3.496）仅与MVPA相关。在同时解释久坐感和MVPA的联合效应中，没有任何学校相关因素在统计学上具有显着意义。这些结果表明，尽管MVPA和久坐不动可能是不同的结构，但它们是相互关联的，在设计减少儿童久坐不动和增加其MVPA的策略时应考虑到这一点。此外，学校环境对这种关系的影响很小，凸显了儿童和家庭特征的重要作用。

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