Cradock Angie L, Barrett Jessica L, Taveras Elsie M, Peabody Stephanie, Flax Chasmine N, Giles Catherine M, Gortmaker Steven L
Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health, Boston, MA, United States of America.
Department of Pediatrics, Massachusetts General Hospital for Children, Boston, MA, United States of America.
Prev Med Rep. 2019 Jul 3;15:100940. doi: 10.1016/j.pmedr.2019.100940. eCollection 2019 Sep.
Many children are not sufficiently physically active. This study uses a quasi-experimental design to evaluate whether participation in a before-school physical activity program called Build Our Kids' Success (BOKS) increases physical activity. Participants ( = 426) were students in Fall, 2016 enrolled in BOKS programming and matched non-BOKS control students from the same grades (Kindergarten-6) and schools in Massachusetts and Rhode Island. Analyses conducted in 2017 examined differences between children in BOKS versus controls in total daily steps, minutes of moderate-to-vigorous (MVPA), vigorous (VPA), and total physical activity (TPA) assessed via Fitbit Charge HR™ monitors. Additional analyses compared physical activity on program days and non-program days. Students (mean age = 8.6 y; 47% female, 58% White, Non-Hispanic) wore monitors an average of 21.7 h/day on 3.2 days during the school week. Compared with controls, on BOKS days, BOKS participants accumulated more steps (1147, 95% confidence interval (CI): 583-1712, < 0.001), MVPA minutes (13.4, 95% CI: 6.6-20.3, P < 0.001), and VPA minutes (4.0, 95% CI: 1.2-6.7, = 0.005). Across all school days, BOKS participants accumulated more total steps than controls (716, 95% CI: 228-1204, = 0.004). Compared to days without BOKS programming, on BOKS days, BOKS participants accumulated more steps (1153; 95% CI: 841-1464, < 0.001) and daily minutes of MVPA (8.8, 95% CI: 5.3-12.2, P < 0.001), VPA (3.0, 95% CI: 1.6-4.5, P < 0.001), and TPA (20.8, 95% CI: 13.6-28.1, P < 0.001). BOKS programming promotes engagement in additional accumulated steps during the school week and physical activity on days that students participate. Clinical Trial Registration: www.ClinicalTrials.gov, NCT03403816, available at: https://clinicaltrials.gov/ct2/show/NCT03403816?term=NCT03403816&rank=1.
许多儿童的身体活动不足。本研究采用准实验设计来评估参与一项名为“助力儿童成功”（BOKS）的学前体育活动计划是否能增加身体活动量。参与者（n = 426）为2016年秋季参加BOKS计划的学生，以及来自马萨诸塞州和罗德岛州同年级（幼儿园至6年级）和学校的匹配的非BOKS对照学生。2017年进行的分析考察了通过Fitbit Charge HR™监测器评估的BOKS组儿童与对照组儿童在每日总步数、中度至剧烈身体活动（MVPA）分钟数、剧烈身体活动（VPA）分钟数和总身体活动量（TPA）方面的差异。额外的分析比较了计划日和非计划日的身体活动情况。学生（平均年龄 = 8.6岁；47%为女性，58%为非西班牙裔白人）在上学期间平均每天佩戴监测器21.7小时，共3.2天。与对照组相比，在BOKS日，BOKS参与者积累了更多的步数（1147，95%置信区间（CI）：583 - 1712，P < 0.001）、MVPA分钟数（13.4，95% CI：6.6 - 20.3，P < 0.001）和VPA分钟数（4.0，95% CI：1.2 - 6.7，P = 0.005）。在所有上学日，BOKS参与者积累的总步数比对照组多（716，95% CI：228 - 1204，P = 0.004）。与没有BOKS计划的日子相比，在BOKS日，BOKS参与者积累了更多的步数（1153；95% CI：841 - 1464，P < 0.001）以及每日MVPA分钟数（8.8，95% CI：5.3 - 12.2，P < 0.001）、VPA分钟数（3.0，95% CI：1.6 - 4.5，P < 0.001）和TPA分钟数（20.8，95% CI：13.6 - 28.1，P < 0.001）。BOKS计划促进了学生在上学期间额外积累步数以及在参与计划的日子里进行身体活动。临床试验注册：www.ClinicalTrials.gov，NCT03403816，可在：https://clinicaltrials.gov/ct2/show/NCT03403816?term=NCT03403816&rank=1查询。
