Kind of a thread hijack, but maybe pertinent, too?

KSH...your post makes your running sound super miserable for you. This is just plain old curiosity...why do you do it? I know you do triathlons...but, I would just be curious to hear your thoughts about what makes all that pain worth it, rather than just focusing on bike riding/racing, and swimming for fun with a masters team (or competing with masters swimmers), etc.?