Children's Obesogenic Behaviors During Summer Versus School: A Within-Person Comparison
Children's Obesogenic Behaviors During Summer Versus School: A Within-Person Comparison
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DOI：
10.1111/josh.12699
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发表时间：
2018-12-01
影响因子：
2.2
通讯作者：
Weaver, Robert G.
中科院分区：
文献类型：
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作者：
Brazendale, Keith;Beets, Michael W.;Weaver, Robert G.
背景证据一致表明，与 9 个月的学年相比，美国儿童在暑假期间（相当于 2.5 个月）体重增加了 3 至 5 倍。本研究的目的是检查儿童在学校期间与夏季期间 4 种致胖行为（体力活动 [PA]、久坐/屏幕时间、饮食和睡眠）的差异。方法结果我们使用了受试者内重复测量设计。儿童（N = 30，平均年龄 = 8.2 岁；57% 为女性；37% 超重/肥胖；100% 非裔美国人）在学校和 2016 年夏季连续 9 天在非惯用手手腕上佩戴加速度计，每天 24 小时，以捕获 PA、久坐时间和睡眠。父母完成每日日记，报告孩子每天的就寝/起床时间、饮食和屏幕时间。混合效应模型比较了暑假和学校的行为。与夏季相比，儿童在夏季久坐的时间更长（占唤醒佩戴时间的 69% 与 67%），处于轻度 PA 的时间更少（占唤醒佩戴时间的 25% 与 23%），看屏幕的时间更长（每天 242 分钟与 123 分钟），睡眠时间更长（每晚 428 分钟与 413 分钟），并且消耗更多的含糖食物（6 天与 2.5 天/周）和水果（7 天与 4.7 天/周）。学校（p < .05）。结论 初步证据表明，与学校相比，儿童在夏季表现出多种不利的肥胖行为，这可能会导致夏季体重加速增加。
BACKGROUND Evidence consistently shows children in the United States gain 3 to 5 times more weight during summer vacation (similar to 2.5 months) compared to the 9-month school year. The purpose of this study is to examine within-child differences in 4 obesogenic behaviors (physical activity [PA], sedentary/screen-time, diet, and sleep) during school versus summer. METHODS RESULTS We used a repeated-measures within-subjects design. Children (N = 30 mean age = 8.2 years; 57% female; 37% overweight/obese; 100% African American) wore accelerometers on the nondominant wrist for 24 hr/d over 9 consecutive days during school and summer of 2016 to capture PA, sedentary time, and sleep. Parents completed a daily diary to report bed/wake times, diet, and screen-time of their child each day. Mixed-effect models compared summer and school behaviors. Children spent more time sedentary (69% vs 67% of wake wear time), less time in light PA (25% vs 23% of wake wear time), had higher screen-time (242 vs 123 minutes/day), slept longer (428 vs 413 minutes/night), and consumed more sugar-based foods (6 days vs 2.5 days/week) and fruit (7 days vs 4.7 days/week) during summer compared to school (p < .05). CONCLUSION Initial evidence suggests children are displaying multiple unfavorable obesogenic behaviors during summer compared to school that may contribute to accelerated weight gain during summer.