... practitioners, health and physicaleducators, sports coaches) and health-related organizations to pro-vide leadership, information, and opportunities to promote a health-ier lifestyle, including ... related to factors that contribute to exercise participation and nonparticipation, partly due to an in-creasingly overweight, inactive, unhealthy population. The need to understand the reasons ... choose to be inactive, the reasons why others beginan exercise program and then quit, and what each of us can do to start and maintain a regular exercise regimen, a concept calledadherence, and to...