'Everyone is an athlete,' wrote the late George Sheehan, running's physician-philosopher. 'The only difference is that some of us are in training, and some are not.' Lifelong runners are in lifelong training. For us, the cliche has become the rule: Running isn't a sport, it's a lifestyle. At a certain point, running stops being about PRs, victories, or new highs in training volume. It becomes a part of who we are. It becomes something our bodies can do, rather than something we do to our bodies.