Jillian Michaels: "5 Biggest Workout Motivation Pitfalls".
Catenacci, V. Obesity, June 2011.
American College of Exercise: "Sports and Exercising Outdoors," "Exercising With Heart Disease," "How to Start An Exercise Program."
Len Kravitz, Ph.D., associate professor of exercise science, The University of New Mexico, Albuquerque.
Kravitz, L. "Exercise Motivation: what Starts and Keeps People Exercising?"
Cleveland Clinic: "Benefits of Water-based Exercise,” “Cholesterol Guide: Exercise Tips."
American Heart Association: "American Heart Association Recommendations for Physical Activity in Adults," "Five Steps to Loving Exercise … or At Least Not Hating It."
Mayo Clinic: "Exercise: A drug-free approach to lowering high blood pressure," "Statin side effects: Weigh the benefits and risks," "Fitness program: 5 Steps to Get Started."
National Diabetes Information Clearinghouse: "What I Need to Know About Physical Activity and Diabetes."
American Academy of Allergy, Asthma and Immunology: "Asthma and Exercise: Tips to Remember."
American Academy of Orthopaedic Surgeons: "Managing Arthritis Pain With Exercise," "Return to Play."
National Center on Health, Physical Activity, and Disability: "2008 Physical Activity Guidelines for Adults With Disabilities," "Certified Inclusive Fitness Trainer," "Aquatic Therapy."
Panteleimon Ekkekakis, Ph.D., associate professor of kinesiology, Iowa State University.
Kathy Smith: "Six Reasons You May Dread Working Out, And What to Do About It," "The Art of Burning Calories All Day Long," "5 Quick Tips for Re-Energizing Your Workout Program."
Pratt, M. The Journal of the American Medical Association, Jan. 27, 1999.
CDC: "How much physical activity do adults need?"
Family Doctor: "The Exercise Habit," "Exercise: How to Get Started."
Andrea Metcalf, celebrity fitness and healthy lifestyle trainer.
BBC: "Brits Trying Not to Do Exercise."