Shaoyou Lu, Fei Long, Ping Lu, Bingli Lei, Zi'an Jiang, Guihua Liu, Jianqing Zhang, Shengtao Ma, Yingxin Yu
Benzophenone-UV filters in personal care products and urine of schoolchildren from Shenzhen, China: Exposure assessment and possible source
The Science of the total environment
schoolbased programs playworks guide students organized activities recess make improvements recess play yard may lead significant increases physical activityespecially girls study builds past research investigating impact playworks separately girls boys twentynine schools randomly assigned receive playworks 1 school year serve control group postintervention physical activity data collected via accelerometers recess observations impacts estimated separately girls boys using regression models girls playworks schools significantly higher accelerometer intensity counts spent time vigorous physical activity girls control schools significant differences based accelerometer data found boys significant impact also found types activities girls engaged recess girls treatment group less likely control group sedentary likely engage jumping tag playground games current findings suggest playworks significant impact measures girls physical activity significant impact measures boys physical activity