The following sites and print sources offer more information. Many of these provided evidence for the information in this section.
Aerobics and Fitness Association of America http://www.afaa.com 
Activity Bursts Everywhere: http://abeforfitness.com 
America on the Move http://aom2.americaonthemove.org 
American Lung Association Running Club http://www.alarc.com/ 
Aquatic Exercise Association http://www.aeawave.com/ 
Center for Disease Control http://www.cdc.gov/physicalactivity 
National Institute on Aging http://www.nia.nih.gov/HealthInformation/Publications/exercise.htm 
National Institute of Health http://health.nih.gov/topic/ExercisePhysicalFitness 
Patience Tai Chi Association http://www.patiencetaichi.com/ 
President's Council on Physical Fitness and Sports http://www.fitness.gov/ 
STOTT PILATESTM http://www.stottpilates.com/ 
Tai Chi Magazine http://www.tai-chi.com/ 
The Walking Site http://www.thewalkingsite.com/ 
Yoga Journal http://www.yogajournal.com/ 
Yogasite http://www.yogasite.com/ 
Anderson, B., Anderson, J. (2010). Stretching: 30th anniversary. Shelter Publications, 30th revised edition.
Bach, M.L., Schleck, L. (2003). ShapeWalking: Six easy steps to your best body. Hunter House.
Buettner, D. (2009). Blue zones: Lessons for living longer from the people who've lived the longest. Washington, D.C.: National Geographic Society.
Craig, C. (2001). Pilates on the ball: The world's most popular workout using the exercise ball. Healing Arts Press.
Dinan, S., Bassey, J. (2003). Strength training for beginners. Harper Resource.
Edwards, S., Reed, S. (2002). The heart rate monitor book for outdoor and indoor cyclists: A heart zone training program. Velo Press.
Fenton, M. (2001). The complete guide to walking for health, weight loss and fitness. Lyons Press.
Friedenreich, C.M., Orenstein, M.R. (2002). Physical activity and cancer prevention: etiologic evidence and biological mechanisms. The Journal of Nutrition; 132(11 Suppl):3456S-3464S.
Hallal, P. C., Andersen, L. B., Bull, F. C., Guthold, R., Haskell, W., & Ekelund, U. (2012). Global physical activity levels: Surveillance progress, pitfalls, and prospects. The Lancet, 380(9838) 247-257.
Janssen, I., Carson, V., Lee, I.M., Katzmarzyk, P.T., Blair, S.N. (2013). Years of life gained due to leisure-time physical activity in the U.S. American Journal of Preventative Medicine; 44(1):23-9.
Karpay, E. (2000). The everything total fitness book. Adams Media Corporation.
Katz, J. (2003).Your water workout: No-impact aerobic and strength training from yoga, pilates, tai chi, and more. Broadway.
Kisner, C., Colby, L. (2012). Therapeutic exercise: Foundations and techniques. Philadelphia, PA: F.A. Davis Company.
Lee, I.M., Shiroma, E.J., Lobelo, F., Puska, P., Blair, S.N., Katzmarzyk, P.T., Lancet Physical Activity Series Working Group. (2012). Effect of physical inactivity on major non-communicable diseases worldwide: an analysis of burden of disease and life expectancy. Lancet;380(9838):219-29.
Lee, I.M., Djoussé, L., Sesso, H.D., Wang, L., Buring, J.E. (2010). Physical activity and weight gain prevention. Journal of the American Medical Association; 303(12):1173McCall, J. (2007). Yoga as Medicine: The Yogic Prescription for Health and Healing. New York: Bantam Dell.
Loprinzi, P.D., Cardinal, B.J. (2013). Association between biologic outcomes and objectively measured physical activity accumulated in ≥10-minute bouts and <10-minute bouts. American Journal of Health Promotion; 27(3):143-51.
Metha, S., Metha, M., Metha, S. (1997). Yoga, the Iyengar way. Alfred A. Knopf.
Nelson, M.E. (2001). Strong women, strong bones. Perigee Books.
Reynolds, G. (2012). The first 20 minutes: Suprising science reveals how we can exercise better, train smarter, live longer. New York: Penguin Group.
Siler, B. (2002). The pilates body: The ultimate at-home guide to strengthening, lengthening, and toning your body - without machines. Broadway Books.
Sneider, H., Sneider, S. (2000). Harry and Sarah Sneider's olympic trainer: Fitness excellence through resistive rebounding. Sneiders Family Fitness, Inc.
Vad, V., Hinzmann, H. (2004). Back rx: A fifteen-minute-a-day yoga and pilates based program to end back pain forever. Gotham Books.
Westlake, L. (2002). Get on the ball: Develop a strong, lean and toned body with an exercise ball. Marlowe & Company.
Wilkins, F., Wilkins, D. (2000). DietMinder personal food and fitness journal (A food and exercise diary). Memory Minder.
Zickerman, A (2004). Power of 10: The once-a-week slow motion fitness revolution. Harper Resources.