Children's moderate-to-vigorous physical activity on weekdays versus weekend days: a multi-country analysis.
Children's moderate-to-vigorous physical activity on weekdays versus weekend days: a multi-country analysis.
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DOI：
10.1186/s12966-021-01095-x
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发表时间：
2021-02-10
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通讯作者：
International Children’s Accelerometry Database (ICAD) Collaborators
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作者：
Brazendale K;Beets MW;Armstrong B;Weaver RG;Hunt ET;Pate RR;Brusseau TA;Bohnert AM;Olds T;Tassitano RM;Tenorio MCM;Garcia J;Andersen LB;Davey R;Hallal PC;Jago R;Kolle E;Kriemler S;Kristensen PL;Kwon S;Puder JJ;Salmon J;Sardinha LB;van Sluijs EMF;International Children’s Accelerometry Database (ICAD) Collaborators
结构化日假说 (SDH) 认为，与结构较少的日子（例如周末）相比，儿童在包含更多“结构”（即预先计划的、分段的和成人监督的环境）（例如学校工作日）的日子里与肥胖相关的行为（例如体力活动）更有利。本研究的目的是使用大型、多国加速度计测量的体力活动数据集来比较儿童在工作日与周末的中度至剧烈体力活动 (MVPA) 水平。数据来自国际儿童加速度计数据库 (ICAD) 2019 年 7 月。ICAD 纳入标准包括有效佩戴日、仅非干预数据（例如基线干预数据）、至少 1 个工作日和 1 个周末的儿童以及仅在学月期间收集数据的 ICAD 研究。考虑数据嵌套性质（即儿童内的天数）的混合效应模型评估了按地区/国家划分的工作日和周末之间每天 MVPA 分钟数（分钟/天 MVPA）的差异，并根据年龄、性别和总佩戴时间进行了调整。单独的荟萃分析模型探讨了按年龄和国家/地区划分的性别和儿童体重状况的差异。使用来自代表 5794 名儿童（61% 为女性，10.7±2.1 岁，24% 超重/肥胖）的 15 项研究的有效数据以及来自 5 个不同国家/地区的 35,263 天的有效加速度计数据。与周末相比，男孩和女孩在工作日累积的 MVPA 分别多出 12.6 分钟/天（95% CI：9.0，16.2）和 9.4 分钟/天（95% CI：7.2，11.6）。与其他国家/地区相比，来自欧洲大陆的儿童差异最大（平日与周末相比，MVPA 多出 17.1 分钟/天，95% CI：15.3、19.0）。被归类为超重/肥胖或正常体重/体重不足的儿童在工作日与周末分别累积了 9.5 分钟/天（95% CI：6.9，12.2）和 10.9 分钟/天（95% CI：8.3，13.5）的额外 MVPA。来自多个国家/地区的儿童在学期间的工作日积累的 MVPA 显着高于周末。这一发现与 SDH 一致，并有必要进行未来的干预研究，优先考虑周末等结构较少的日子，并考虑为所有儿童提供额外的活动机会。
The Structured Days Hypothesis (SDH) posits that children’s behaviors associated with obesity – such as physical activity – are more favorable on days that contain more ‘structure’ (i.e., a pre-planned, segmented, and adult-supervised environment) such as school weekdays, compared to days with less structure, such as weekend days. The purpose of this study was to compare children’s moderate-to-vigorous physical activity (MVPA) levels on weekdays versus weekend days using a large, multi-country, accelerometer-measured physical activity dataset. Data were received from the International Children’s Accelerometer Database (ICAD) July 2019. The ICAD inclusion criteria for a valid day of wear, only non-intervention data (e.g., baseline intervention data), children with at least 1 weekday and 1 weekend day, and ICAD studies with data collected exclusively during school months, were included for analyses. Mixed effects models accounting for the nested nature of the data (i.e., days within children) assessed MVPA minutes per day (min/day MVPA) differences between weekdays and weekend days by region/country, adjusted for age, sex, and total wear time. Separate meta-analytical models explored differences by age and country/region for sex and child weight-status. Valid data from 15 studies representing 5794 children (61% female, 10.7 ± 2.1 yrs., 24% with overweight/obesity) and 35,263 days of valid accelerometer data from 5 distinct countries/regions were used. Boys and girls accumulated 12.6 min/day (95% CI: 9.0, 16.2) and 9.4 min/day (95% CI: 7.2, 11.6) more MVPA on weekdays versus weekend days, respectively. Children from mainland Europe had the largest differences (17.1 min/day more MVPA on weekdays versus weekend days, 95% CI: 15.3, 19.0) compared to the other countries/regions. Children who were classified as overweight/obese or normal weight/underweight accumulated 9.5 min/day (95% CI: 6.9, 12.2) and 10.9 min/day (95% CI: 8.3, 13.5) of additional MVPA on weekdays versus weekend days, respectively. Children from multiple countries/regions accumulated significantly more MVPA on weekdays versus weekend days during school months. This finding aligns with the SDH and warrants future intervention studies to prioritize less-structured days, such as weekend days, and to consider providing opportunities for all children to access additional opportunities to be active.