Van Kann Dave H H, de Vries S I, Schipperijn J, de Vries N K, Jansen M W J, Kremers S P J
1 Department of Health Promotion, School of Public Health and Primary Care (CAPHRI), Maastricht University, Maastricht, The Netherlands.
2 Academic Collaborative Center for Public Health Limburg, Public Health Services, Geleen, The Netherlands.
J Phys Act Health. 2016 Oct 24:1-28. doi: 10.1123/jpah.2015-0702.
Background Aim of the study was to test the 12-month effects of a multicomponent physical activity (PA) intervention at schoolyards on recess PA levels of 6th and 7th grade children in primary schools, combining Global Positioning System (GPS) and accelerometry data. Methods A quasi-experimental study design was used with 20 paired intervention and control schools. GPS confirmatory analyses were applied to validate attendance at schoolyards during recess. Data from 376 children from 7 pairs of schools were included in the final analyses. Pooled intervention effectiveness was tested by multilevel linear regression analyses, whereas effectiveness of intervention components was tested by multivariate linear regression analyses. Results Children exposed to the multicomponent intervention increased their time spent in light PA (+5.9%) during recess. No pooled effects on Moderate-to-Vigorous PA were found. In depth-analyses on intervention components showed that physical schoolyard interventions particularly predicted a decrease in time spent in sedentary behavior during recess at follow-up. Intervention intensity and school's commitment to the project strengthened this effect. Conclusions The multicomponent schoolyard PA intervention was effective in making children spend a larger proportion of recess time in light PA, which was most likely the result of a shift from sedentary behavior to light PA.
背景 本研究的目的是结合全球定位系统（GPS）和加速度计数据，测试在校园内进行的多组分体育活动（PA）干预对小学六年级和七年级儿童课间PA水平的12个月影响。方法 采用准实验研究设计，有20对干预学校和对照学校。应用GPS验证性分析来确认课间在校园的出勤情况。最终分析纳入了来自7对学校的376名儿童的数据。通过多水平线性回归分析测试合并干预效果，而通过多元线性回归分析测试干预组分的效果。结果 接受多组分干预的儿童在课间进行轻度PA的时间增加（+5.9%）。未发现对中度至剧烈PA有合并效应。对干预组分的深入分析表明，校园体育干预尤其预测了随访期间课间久坐行为时间的减少。干预强度和学校对该项目的投入增强了这一效果。结论 多组分校园PA干预有效地使儿童在课间将更大比例时间用于轻度PA，这很可能是从久坐行为转向轻度PA的结果。
