Dr. Robert G. Marx is an orthopedic surgeon at the Hospital for Special Surgery in New York City and Professor of Orthopedic Surgery at the Weill Medical College of Cornell University. Regarded among the world's top orthopedic surgeons, Dr. Marx has treated thousands of knee and shoulder injuries, and is well known for his expertise in ACL and complex multi-ligament knee reconstructive surgery. A former member of the Editorial Advisory Board for Muscle and Fitness magazine, Dr. Marx has written a book on bone tumors and has published more than 100 peer-reviewed articles in leading orthopedic and research journals, including the prestigious New England Journal of Medicine. He was awarded with the 2003 O'Donoghue Sport Injury Research Award by the American Orthopedic Society for Sports Medicine for his study on determinants of knee injury following anterior cruciate ligament (ACL) tears. Dr. Marx has appeared on national television and lectured extensively worldwide on knee and shoulder surgery, including the description of new surgical techniques he has developed. As a visiting professor of orthopedic surgery, he has been invited to speak at many academic institutions, including Harvard University and The Mayo Clinic. He also has his own personal website DrRMarx.com and is a regular contributor to the Hospital for Special Surgery's website.