Bob Greene was born December 8, 1958 in Cherry Hill, N.J. He is a graduate of Cherry Hill High School East. He then studied physical education at The University of Delaware and earned his master's degree in exercise physiology from the University of Arizona. He is a member of the American College of Sports Medicine. Greene has authored over ten books concerning weight-loss, diet and health, including two books co-authored by Oprah Winfrey. He is a frequent guest on The Oprah Winfrey Show, has a radio show on the "Oprah and Friends" satellite radio network and is a contributor to O magazine. His book entitled 20 Years Younger made the Publisher's Weekly best seller list for 2011.