Kelly McGonigal, Ph.D., is an award-winning instructor at Stanford University, where she teaches yoga, psychology, and healthy back classes. She is a leader in mind-body science and practice, and provides teacher trainings and continuing education for yoga, fitness, and health care professionals. McGonigal is editor-in-chief of the International Journal of Yoga Therapy and a frequent writer for publications such as Yoga Journal and IDEA Fitness Journal. Visit her online at www.kellymcgonigal.com.
Foreword writer Timothy McCall, MD, is a board-certified internist, medical editor of Yoga Journal, and author of two books, Yoga as Medicine and Examining Your Doctor. He currently lives in the San Francisco Bay area, and presents lectures, seminars, and yoga workshops internationally.