Recess physical activity and school-related social factors in Finnish primary and lower secondary schools: cross-sectional associations

por Haapala, Henna L, Hirvensalo, Mirja H, Laine, Kaarlo, Laakso, Lauri, Hakonen, Harto, Kankaanpää, Anna, Lintunen, Taru, Tammelin, Tuija H
Publicado 2014