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American College of Rheumatology: "Exercise and Arthritis."
American College of Sports Medicine: "How Does Exercising at Work Influence Work Productivity?"
American Diabetes Association: "Top 10 Benefits of Being Active."
American Heart Association: "Physical Activity Improves Quality of Life."
American Psychological Association: "Exercise fuels the brain's stress buffers," "The Exercise Effect."
Anxiety and Depression Association of America: "Exercise for Stress and Anxiety."
CDC: "Physical Activity and Health."
Feltz, D. Exercise & Sports Sciences Reviews, January 1988.
Harvard Health Publications, Harvard Medical School: "Exercising to relax."
Hassmen, P. Preventive Medicine, January 2000.
Moore, S. PLOS Medicine, November 2012.
National Sleep Foundation: "2013 Sleep in America Poll, Exercise and Sleep," "National Sleep Foundation Poll Finds Exercise Key to Good Sleep."
NIH Osteoporosis and Related Bone Diseases National Resource Center: "Exercise For Your Bone Health."
Puetz, T. Psychological Bulletin, November 2006.
SurgeonGeneral.gov: "Overweight and Obesity: What Can You Do?"
TeensHealth: "Why Exercise Is Wise."
UptoDate: "Patient information: Arthritis and exercise (Beyond the Basics)."