Xiaoxia Lin, Xianrui Chen, Yanhui Chen, Ping Xu, Shan Chen
Sleep initiation patterns and sleep quality among toddlers in the southeast of China: initial study results
BMC pediatrics
objectives study 1 determine impact 1year elementary school physical activity intervention changes teacherreported schoolbased physical activity time 2 assess relationship changes changes student aerobic capacity healthmpowers nonprofit organization provided multicomponent physical activity intervention 3479 students 39 schools georgia 20132014 healthmpowers administered survey faculty members august 2013 may 2014 intervention measure student physical activity times organization collected pre postintervention progressive aerobic cardiovascular endurance run pacer laps measure aerobic capacity awards 1 lap completed 20meter lap 2342 fourthgrade students performed linear regression determine relationship schoollevel changes teacherreported schoolbased physical activity time student aerobic capacity weekly estimated teacherreported time physical activity increased 39 minutes pre postintervention 21 minutes recess 17 minutes classroom 1 minute physical education mean number student pacer laps increased 3 laps pre postintervention 1515 2342 65 students increased number pacer laps completed observed positive association schoollevel changes schoolbased physical activity time schoollevel changes pacer laps r 038 95 confidence interval 029046 findings highlight need prospective research multicomponent physical activity interventions rigorous testing including randomized controlled trials largescale implementations needed examine schoolbased interventions might used improve physical activity fitness larger populations children