1. American College of Sports Medicine 2009 President Obama urged to prioritize physical activity http://www.acsm.org/about-acsm/media-room/acsm-in-the-news/2011/08/01/president-obama-urged-to-prioritize-physical-activity
2. American College of Sports Medicine 2011 Exercise is medicine month, lauds the benefits of physical activity http://www.acsm.org/about-ascm/media-room/acsm-in-the-news/2011/08/01/may-2011-exercise-is-medicine-month-lauds-the-benefits-of-physical-activity
3. American Medical Association 2008 Health care trends 2008: An environmental analysis report http://www.ama-assn.org/resources/doc/clrpd/2008-trends.pdf
4. Health care charges associated with physical inactivity, overweight, and obesity;Anderson;Preventing Chronic Disease,2005
5. Randomized trial of three strategies to promote physical activity in general practice;Armit;Preventive Medicine,2009