As pointed out by Faulkner, Yun, Tremblay and Spence, since 1971, ParticipACTION has been working to encourage Canadians to add more physical activity to their daily lives. To date, ParticipACTION has been largely successful. This special issue provides a basis of evidence which demonstrates ParticipACTION’s effectiveness in increasing organizational awareness and capacity as well as readiness and advocacy for promoting physical activity.