is an Assistant Professor in Medicine and Director of Tai Chi and Mind-Body Research Programs in Harvard Medical School's Division for Research and Education in Complementary and Integrative Medical Therapies. His current research focuses on evaluating how Tai Chi, Qigong, and related mind-body practices clinically impact a variety of health conditions (osteoporosis, balance impairment, heart failure, pulmonary disease), and understanding the physiological, mechanical, and psychological mechanisms underlying mind-body practices' therapeutic effects. Peter also has more than 30 years of training experience in Tai Chi and Qigong, and is an internationally recognized teacher of these practices.