As we get older, how can we still enjoy a runners high or exercise-induced euphoria, while being careful not to get injured? Dr. Kevin R. Stone is an orthopedic surgeon, the founder of the Stone Clinic in San Francisco, and author of Play Forever: How to Recover from Injury and Thrive. With a passion for helping patients play until they drop, Dr. Stone is redefining what it means to maintain a high-quality, active lifestyle across the decades. In this conversation he challenges the convention...