Ridgers Nicola D, Stratton Gareth, Fairclough Stuart J, Twisk Jos W R
Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Henry Cotton Campus, 15-21 Webster Street, Liverpool L3 2ET, UK.
Prev Med. 2007 May;44(5):393-7. doi: 10.1016/j.ypmed.2007.01.009. Epub 2007 Feb 1.
The aim of the study was to investigate the impact of a playground redesign intervention across time on children's recess physical activity levels using combined physical activity measures and to evaluate the potential influence of covariates on the intervention effect.
Fifteen schools located in areas of high deprivation in one large city in England each received 20,000 pounds through a national 10 million pounds Sporting Playgrounds Initiative to redesign the playground environment based on a multicolored zonal design. Eleven schools served as matched socioeconomic controls. Physical activity levels during recess were quantified using heart rate telemetry and accelerometry at baseline, 6 weeks and 6 months following the playground redesign intervention. Data were collected between July 2003 and January 2005 and analyzed using multilevel modeling.
Statistically significant intervention effects were found across time for moderate-to-vigorous and vigorous physical activity assessed using both heart rate and accelerometry.
The results suggest that a playground redesign, which utilizes multicolor playground markings and physical structures, is a suitable stimulus for increasing children's school recess physical activity levels.
本研究旨在通过综合身体活动测量方法，调查操场重新设计干预措施随时间推移对儿童课间身体活动水平的影响，并评估协变量对干预效果的潜在影响。
英格兰一个大城市中处于高贫困地区的15所学校，通过一项全国性的1000万英镑体育操场倡议，每所学校获得2万英镑，用于基于彩色分区设计重新设计操场环境。11所学校作为社会经济匹配对照。在操场重新设计干预前、干预后6周和6个月，使用心率遥测和加速度计对课间身体活动水平进行量化。数据收集于2003年7月至2005年1月期间，并使用多水平模型进行分析。
使用心率和加速度计评估的中度至剧烈身体活动和剧烈身体活动在整个时间段内均发现了具有统计学意义的干预效果。
结果表明，利用彩色操场标记和物理结构进行的操场重新设计，是提高儿童学校课间身体活动水平的合适刺激因素。
