title: Medicine in motion.
abstract: When C. Everett Koop exclaimed that exercise is the "most potent modifier of health" in medicine today ((1)), he was merely echoing what most of us have known for the past 25 years. Exercise is not only recreation and work, it is also therapy, prevention, and treatment. Primary care physicians inherently practice "sports medicine" with each patient they treat because they know the inherent health benefits of physical activity. As a result, society now has a greater consciousness about sports medicine and the benefits of exercise than ever before.
authors.affiliation: University of Pittsburgh Medical Center, PA, 15213-3221, USA.
authors.forename: D B
authors.initials: DB
authors.lastname: McKeag