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BACKGROUNDSchool‐based programs, such as Playworks, that guide students in organized activities during recess and make improvements to the recess play yard may lead to significant increases in physical activity—especially for girls. This study builds on past research by investigating the impact of Playworks separately for girls and boys.
METHODSTwenty‐nine schools were randomly assigned to receive...
To evaluate the impact of Playworks on students' physical activity during recess.Twenty-seven elementary schools from six U.S. cities were grouped into blocks and randomly assigned to implement Playworks (treatment) or not (control) during an entire school year (either 2010–2011 or 2011–2012). Study data were collected at the end of the school year only. Fourth- and 5th-grade students (n=2278) reported...
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