No other athlete this century has defied the calendar like the late Johnny Kelley. Named Runner of the Century by Runner's World magazine, Kelley participated in over sixty Boston Marathons, winning the event twice and running it well into his eighties. His persistence, warm good nature, and athletic achievements endeared him to generations, and to many he was thought of as the heart and soul of the world-famous Boston Marathon.

Johnny's life is a golden story, rich in running history and human feelings. Young at Heart is filled with remarkable stories of distance running throughout the twentieth century and the Boston Marathon. But Young at Heart is not just for runners; it’s a wonderful story for people of all abilities and interests who want to give life their very best and, metaphorically, never stopped running.