PLAYgrounds: Effect of a PE playground program in primary schools on PA levels during recess in 6 to 12 year old children. Design of a prospective controlled trial
Janssen, Mirka; Toussaint, Huub M; Van Mechelen, Willem; Verhagen, Evert ALM
Meer bewegen, beter bij de les?
de Laat, Noortje; Janssen, Mirka; M. Toussaint, H.