Dr. Loren Fishman is the medical director of Manhattan Physical Medicine and Rehabilitation in New York City, and the author or editor of more than 70 academic articles. He is a world-recognized pioneer in the treatment of piriformis syndrome and rotator cuff tear, and an expert in relieving back pain. Dr. Fishman has a particular interest in integrative medicine and yoga, and he has written four books about yoga and medical conditions, including 'Yoga for Osteoporosis'. He is currently running a large clinical trial to study the effects of yoga on osteoporosis and has published some results.