A randomised controlled trial of multiple periods of outdoor free-play to increase moderate-to-vigorous physical activity among 3 to 6 year old children attending childcare: study protocol

- Wolfenden, Luke; Wiggers, John; Morgan, Philip; Razak, Lubna Abdul; Jones, Jannah; Finch, Meghan; Sutherland, Rachel; Lecathelinais, Christophe; Gillham, Karen; Yoong, Sze Lin