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首页> 外文期刊>BMC Public Health >Effectiveness and feasibility of lowering playground density during recess to promote physical activity and decrease sedentary time at primary school
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Effectiveness and feasibility of lowering playground density during recess to promote physical activity and decrease sedentary time at primary school

机译：降低课间休息期间操场密度以促进体育锻炼和减少久坐时间的有效性和可行性

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Background This pilot study aimed at investigating the effectiveness of lowering playground density on increasing children’s physical activity and decreasing sedentary time. Also the feasibility of this intervention was tested. Methods Data were collected in September and October 2012 in three Belgian schools in 187, 9–12?year old children. During the intervention, playground density was decreased by splitting up recesses and decreasing the number of children sharing the playground. A within-subject design was used. Children wore accelerometers during the study week. Three-level (class – participant - measurement (baseline or intervention)) linear regression models were used to determine intervention effects. After the intervention week the school principals filled out a questionnaire concerning the feasibility of the intervention. Results The available play space was 12.18?±?4.19?m2/child at baseline and increased to 24.24?±?8.51?m2/child during intervention. During the intervention sedentary time decreased (?0.58?min/recess; -3.21%/recess) and moderate-to-vigorous physical activity (+1.04?min/recess; +5.9%/recess) increased during recess and during the entire school day (sedentary time: -3.29%/school day; moderate-to-vigorous physical activity +1.16%/school day). All principals agreed that children enjoyed the intervention; but some difficulties were reported. Conclusions Lowering playground density can be an effective intervention for decreasing children’s sedentary time and increasing their physical activity levels during recess; especially in least active children.
机译：背景这项初步研究旨在调查降低游乐场密度对增加儿童的体育活动和减少久坐时间的有效性。还测试了这种干预的可行性。方法于2012年9月和2012年10月在3所比利时的187名9-12岁儿童中收集数据。在干预期间，通过拆分凹处并减少共享游乐场的儿童数量来降低游乐场的密度。使用受试者内部设计。在学习周中，孩子们戴了加速度计。使用三级（班级–参与者–测量（基线或干预））线性回归模型来确定干预效果。干预周结束后，学校负责人填写了有关干预可行性的调查表。结果基线时儿童的可用游戏空间为12.18？±？4.19？m 2 /儿童，干预期间增加至24.24？±？8.51？m 2 /儿童。干预期间，整个休假期间和整个学校的久坐时间减少了（？0.58？min / recess; -3.21％/ recess），中度到剧烈运动量（+1.04？min / recess; + 5.9％/ recess）增加了。一天（上课时间：-3.29％/上学日;中度到剧烈运动量+ 1.16％/上学日）。所有的校长都同意，孩子们喜欢干预。但据报道有些困难。结论降低游乐场密度可以有效减少儿童久坐的时间，并增加他们在休息时的身体活动水平。特别是最不活跃的孩子。

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