He is the Director of Outpatient Medical Services of the Spaulding Rehabilitation Hospital Network in Boston, Massachusetts. Dr. Phillips� clinical and academic work at the intersection of exercise physiology and mental health spawned his interest in Lifestyle Medicine. He is founder and director of The Institute of Lifestyle Medicine in the Department of Physical Medicine and Rehabilitation at Harvard Medical School. Additionally, Dr. Phillips serves on the American College of Sports Medicine task force that has initiated and developed the Exercise is Medicine program. His book on the topic, Exercise is Medicine, The Clinician's Guide to the Exercise Prescription was published by Lippincott, Williams and Wilkins in early 2009.