1. Physical activity and health;Bouchard;Med Sci Sports Exerc,2001
2. US Department of Health and Human Services, 2000. Healthy People 2010: Understanding and Improving Health. 2nd edition. Available at: http://www.health.gov/healthypeople/. Accessed June 2, 2004.
3. Youth risk behavior surveillance—United States, 2001;Gunbaum;J Sch Health,2002
4. Factors influencing physical activity levels among Canadian youth;Wharf-Higgins;Can J Pub Health,2003
5. Adolescence;Corbin;Research Digest,1999