American College of Sports Medicine
   Promotes fitness, health and quality of life through research, education and practical applications of sports medicine.
   http://www.acsm.org

American Society of Exercise Physiologists
   Certification (EPC), undergraduate academic accreditation, electronic research (JEPonline) and publications (PEPonline), licensure through state affiliates.
   http://www.asep.org

Association of Women's Fitness
   Resource site on women's fitness and health, with a special focus on preventing home gym training injuries.
   http://www.association-of-womens-fitness.org

IDEA
   Supports the world's leading health and fitness professionals with credible information, education, career development and leadership.
   http://www.ideafit.com

IHRSA
   International Health, Racquet and Sportsclub Association: Organization that promotes fitness through education and sport club membership.
   http://www.IHRSA.org/

International Yoga Federation
   Lists the national and continental yoga organizations.
   http://fiy.yoganet.org

Moms In Motion
   Programs provide fitness training for women and raise money for local charities.
   http://www.momsinmotion.com

National Association for Health and Fitness
   A not-for-profit organization that exists to improve the quality of life of every individual in the United States through the promotion of physical fitness and healthy lifestyles and by fostering and supporting Councils for physical activity, health and s
   http://www.physicalfitness.org/

National Center on Physical Activity and Disability
   NCPAD encourages persons with disabilities to participate in regular physical activity to promote healthy lifestyles and prevent secondary conditions.
   http://www.ncpad.org/

National Institute for Fitness and Sport
   Non-profit organization committed to enhancing human health, physical fitness and athletic performance through research, education and service.
   http://www.nifs.org

National Strength and Conditioning Association
   Non-profit association dedicated to facilitating the exchange of ideas in strength development as it relates to the improvement of athletic performance and fitness.
   http://www.nsca-lift.org/menu.asp

The Fitness League
   National network of locally based exercise classes, suitable for all ages and abilities, available in over 300 venues across the UK.
   http://www.thefitnessleague.com/