Robert Klapper, MD, is Chief of Orthopedic Surgery at Cedars-Sinai Medical Group in Los Angeles. He has performed surgery on over twelve thousand people, but tries to keep all of them out of the operating room by first having them try conservative treatments such as pool therapy. He has written articles for "Clinical Orthopedics and Related Research" and the "American Journal of Sports Medicine". He is the host of ESPN radio s Weekend Warrior and the sports medicine expert on Fox Sports 1 TV.