Bob Greene (born December 8, 1958) is an American exercise physiologist and certified[vague] personal trainer specializing in fitness, metabolism, and weight loss.
[citation needed] He is a member of the American College of Sports Medicine.
[citation needed] 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.
He lives in Santa Barbara, California with his wife, Urania, and their daughter.