Time this week has a short interview with Lance Armstrong (who, of course, is on my short list of heroes). In it, he echoes my standard explanation of the allure of endurance sports: "I'm not happy if I'm not doing some physical suffering, like going out on a bike ride or running. First, it's good for you. No. 2, it sort of clears my mind on a daily basis."
Lance is going to be in St Louis on October 15th.