Sat Bir Singh Khalsa, Ph.D. is a Corresponding Member of the Faculty of Medicine at Harvard Medical School retiring as Associate Professor of Medicine. He is also Director of Research for the Kundalini Research Institute, Research Associate at the Benson Henry Institute for Mind Body Medicine, and Research Affiliate at the Osher Center for Integrative Medicine. He has conducted research on yoga since 2001 and is a certified teacher of Kundalini yoga. His research has evaluated yoga for insomnia, stress, trauma, and anxiety, and in workplace and public school settings. He works with the International Association of Yoga Therapists as editor-in-chief of the International Journal of Yoga Therapy and as chair of the scientific program committee for its annual conference. He is medical editor of the Harvard Medical School Special Report Introduction to Yoga, and chief editor of the medical textbook The Principles and Practice of Yoga in Health Care.