Dr. Sherry Backus has been a physical therapist in the Rehabilitation Department of HSS and part of the Leon Root MD, Motion Analysis Laboratory (previously the Pathokinesiology Laboratory) staff since 1982. She is currently responsible for both clinical and research testing and design at the Leon Root MD, Motion Analysis Laboratory. In addition to clinical gait analysis, she has expertise in strength testing, functional performance measures and electromyography in individuals of all ages. Dr. Backus lectures on physical therapy, biomechanics, and gait analysis (both pediatric and adult orthopaedics) in New York area universities and hospitals, but also at the University of Tennessee-Memphis. She has spoken both nationally and internationally on gait analysis research. Her research interests are in the quantitative and qualitative analysis of lower and upper extremity movement dysfunction, particularly in using data to better inform surgery, therapy and performance. Her research focuses on shoulder and wrist biomechanics and function; hip, knee and ankle biomechanics and function; and muscle function in healthy individuals and those who have had orthopedic surgery. She has collaborated with orthopedic surgeons, scientists and biomechanists.