Howe C A, Freedson P S, Alhassan S, Feldman H A, Osganian S K
Department of Kinesiology, University of Massachusetts, Amherst, MA, USA.
Pediatr Obes. 2012 Feb;7(1):82-8. doi: 10.1111/j.2047-6310.2011.00007.x.
Schools provide a prime environment for interventions that attempt to increase physical activity and prevent obesity.
This study examined the effect of a 30-min, structured recess using 22 games of known energy expenditure on moderate-to-vigorous physical activity when compared to free play implemented with third graders from two elementary schools over 9 weeks.
Moderate-to-vigorous physical activity and other cardiovascular risk factors were assessed pre- and post-intervention in 27 children.
Moderate-to-vigorous physical activity during recess increased significantly in intervention school children from 6.9 ± 0.8 to 14.9 ± 0.9 min pre- and post-intervention, respectively (adjusted mean change 8.0 ± 1.1; P < 0.0001), with no differences by gender or body mass index (BMI). In-school, moderate-to-vigorous physical activity also increased significantly more for intervention compared to control children (adjusted mean change 14 ± 4 min vs. 3 ± 3 min; P = 0.014, respectively).
There was no significant difference in BMI and cardiovascular risk factors. A structured recess is feasible to implement and can significantly increase moderate-to-vigorous physical activity.
学校为试图增加身体活动和预防肥胖的干预措施提供了理想环境。
本研究比较了两所小学三年级学生在9周内进行的30分钟结构化课间休息（使用22种已知能量消耗的游戏）与自由玩耍对中等到剧烈身体活动的影响。
对27名儿童在干预前后评估中等到剧烈身体活动及其他心血管危险因素。
干预学校儿童课间休息时的中等到剧烈身体活动在干预前后分别从6.9±0.8分钟显著增加到14.9±0.9分钟（调整后平均变化8.0±1.1；P<0.0001），在性别或体重指数（BMI）方面无差异。在学校内，与对照儿童相比，干预组儿童的中等到剧烈身体活动增加也更显著（调整后平均变化分别为14±4分钟和3±3分钟；P = 0.014）。
BMI和心血管危险因素无显著差异。结构化课间休息实施可行，且能显著增加中等到剧烈身体活动。
