American Academy of Family Physicians
http://www.aafp.org
Active Aging Partnership
http://www.agingblueprint.org
American College of Sports Medicine
http://www.acsm.org
American Geriatrics Society
http://www.americangeriatrics.org
American Physical Therapy Association
http://www.apta.org
The National Center on Physical Activity and Disability
http://www.ncpad.org
The The President's Challenge
http://www.presidentschallenge.org
Thera-Band
http://www.thera-band.com