BACKGROUND Physical activity is associated with improved physical and mental health among children, but many children do not meet the recommended hour per day of moderate-to-vigorous-intensity physical activity (MVPA). The aim of this paper is to investigate participation in active after-school clubs and active travel to and from school at age 11 and estimate the average daily minutes of MVPA associated with active club attendance and active travel. METHODS Accelerometer data were collected on three weekdays for 1296 11-year-old children in a cross-sectional study. Children reported attendance at active after-school clubs and how they travelled to and from school for each day of the week. To account for repeat days within child and clustering within schools we used multilevel models with random effects at the school and child level, and fixed effects for all covariates. We calculated odds ratios for participation in active after-school clubs and active travel for gender, measures of socio-economic position and BMI category. We also explored the association between active club attendance, active travel and daily average MVPA. RESULTS Boys and girls were equally likely to attend active after-school clubs. Boys were more likely to travel to school using active modes. Attendance at active after-school clubs and active travel home were not associated with each other. Attending an active after-school club was associated with an additional 7.6 min (95% CI: 5.0 to 10.3) average MVPA on that day among both boys and girls. Active travel was associated with an additional 4.7 min (95% CI: 2.9 to 6.5) average MVPA per journey for boys and 2.4 min (95% CI: 1.0 to 3.7) for girls. CONCLUSIONS Both active after-school clubs and active travel are associated with greater physical activity on the day that children participate in these, and we saw no evidence that those attending active clubs do so at the expense of active travel home afterwards. While the increased daily MVPA is small to moderate, active after-school clubs and active travel on multiple days of the week could make important contributions as part of complex interventions aimed at increasing population levels of physical activity in children.

中文翻译：

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与学校相关的积极旅行和活跃的课后俱乐部与儿童体育活动的关联：一项针对 11 岁英国儿童的横断面研究。

背景技术身体活动与儿童身心健康的改善相关，但许多儿童没有达到每天建议的中度至剧烈强度身体活动（MVPA）的时间。本文的目的是调查 11 岁时参加活跃的课外俱乐部和积极往返学校的情况，并估计与活跃俱乐部出席和积极出行相关的 MVPA 平均每日分钟数。方法 在一项横断面研究中，在三个工作日收集了 1296 名 11 岁儿童的加速度计数据。孩子们报告了活跃的课外俱乐部的参加情况以及一周中每一天如何往返学校。为了考虑儿童内的重复天数和学校内的聚类，我们使用了多级模型，在学校和儿童级别上具有随机效应，并对所有协变量具有固定效应。我们计算了参与活跃的课外俱乐部和积极旅行的性别比、社会经济地位衡量指标和体重指数类别的比值比。我们还探讨了俱乐部活跃度、活跃旅行和日均 MVPA 之间的关联。结果 男孩和女孩参加活跃的课外俱乐部的可能性相同。男孩更有可能使用主动模式去学校。参加活跃的课外俱乐部和活跃的回家旅行彼此不相关。参加活跃的课外俱乐部与男孩和女孩当天的平均 MVPA 增加 7.6 分钟（95% CI：5.0 至 10.3）相关。积极旅行与男孩每次旅行的平均 MVPA 增加 4.7 分钟（95% CI：2.9 至 6.5）有关，女孩每次旅行平均 MVPA 增加 2.4 分钟（95% CI：1.0 至 3.7）。结论 活跃的课外俱乐部和活跃的旅行都与孩子们参加活动当天更多的身体活动有关，而且我们没有看到任何证据表明参加活跃俱乐部的人会牺牲放学后回家的活跃旅行。虽然每日 MVPA 的增加幅度为小到中等，但作为旨在提高儿童体育活动人口水平的复杂干预措施的一部分，活跃的课后俱乐部和每周多天的积极旅行可以做出重要贡献。