Nilsson Andreas, Andersen Lars Bo, Ommundsen Yngvar, Froberg Karsten, Sardinha Luis B, Piehl-Aulin Karin, Ekelund Ulf
School of Health and Medical Sciences, Orebro University, Orebro, Sweden.
BMC Public Health. 2009 Sep 7;9:322. doi: 10.1186/1471-2458-9-322.
Identifying leisure time activities performed before and after school that influence time in physical activity (PA) and/or time spent sedentary can provide useful information when designing interventions aimed to promote an active lifestyle in young people. The purpose of this study was to examine associations between mode of transportation to school, outdoor play after school, participation in exercise in clubs, and TV viewing with objectively assessed PA and sedentary behaviour in children.
A total of 1327 nine- and 15-year-old children from three European countries (Norway, Estonia, Portugal) participated as part of the European Youth Heart Study. PA was measured during two weekdays and two weekend days using the MTI accelerometer, and average percent of time in moderate-to-vigorous PA (MVPA) and time spent sedentary were derived. Potential correlates were assessed by self-report. Independent associations between self-reported correlates with percent time in MVPA and percent time sedentary were analysed by general linear models, adjusted by age, gender, country, measurement period, monitored days and parental socio-economic status.
In 9-year-olds, playing outdoors after school was associated with higher percent time in MVPA (P < 0.01), while participation in sport clubs was associated with higher percent time in MVPA (P < 0.01) in 15-year-olds. No associations with percent time sedentary were observed in either age group.
Frequency of outdoor play after school is a significant correlate for daily time in MVPA in 9-year-olds, while this correlate is attenuated in favour of participation in sport and exercise in clubs in 15-year-olds. Targeting walking to school or reduced TV viewing time in order to increase time in daily MVPA in children is unlikely to be sufficient. Correlates related to time spent sedentary need further examination.
确定在上学前后进行的休闲活动对体育活动（PA）时间和/或久坐时间的影响，可为设计旨在促进年轻人积极生活方式的干预措施提供有用信息。本研究的目的是调查儿童上学交通方式、放学后户外玩耍、参加俱乐部锻炼以及看电视与客观评估的PA和久坐行为之间的关联。
来自三个欧洲国家（挪威、爱沙尼亚、葡萄牙）的1327名9岁和15岁儿童作为欧洲青年心脏研究的一部分参与研究。在两个工作日和两个周末使用MTI加速度计测量PA，并得出中度至剧烈PA（MVPA）的平均时间百分比和久坐时间。通过自我报告评估潜在的相关因素。通过一般线性模型分析自我报告的相关因素与MVPA时间百分比和久坐时间百分比之间的独立关联，并根据年龄、性别、国家、测量期、监测天数和父母社会经济地位进行调整。
在9岁儿童中，放学后户外玩耍与MVPA时间百分比更高相关（P < 0.01），而在15岁儿童中，参加体育俱乐部与MVPA时间百分比更高相关（P < 0.01）。在两个年龄组中均未观察到与久坐时间百分比的关联。
放学后户外玩耍的频率是9岁儿童每日MVPA时间的一个重要相关因素，而在15岁儿童中，这种相关性减弱，有利于参加俱乐部的体育和锻炼。以步行上学或减少看电视时间来增加儿童每日MVPA时间可能并不足够。与久坐时间相关的因素需要进一步研究。
