Running: at what point is it a disorder?

Barbara mentioned an article she read that talked about compulsive exercising, and it raises some points for discussion. I initially had some silly things to say, condemning the 'everything in moderation' folks, and how they keep pushing their way of life down my throat. What a bunch of assholes! (just kidding, mostly) :)

But I won't joke about it anymore, it's a serious thing, and some people have real problems with anorexia or bulimia, and some people are compulsive exercisers that work-out 5+ hours a day, and eat next to nothing, to the point that they put their health at risk.

As an undergrad I did attend a few psychology classes (as I earned my psychology degree), so I'm not without opinion on this. Generally, most therapists consider 'healthy' behavior a disorder when it no longer serves their best interest, like when they begin to place their workouts ahead of their job or family and their life starts to fall apart from it. Or, of course, when it's no longer healthy, and their body fat gets too low or their body breaks down in some way.

What do you think? Feel free to address zero or more of these questions:

How much running is too much running?

Without eating too little, or exercising too much, is it a disorder to be too committed to your training, or too strictly adherent to it?

Do you do everything in moderation? (or as Dr. Vargo from Koala likes to say, "everything in moderation, including moderation")

Anyway, 5.1 miles this morning.
I sleep now.
Keith out.