I find it fascinating that the (over)exercise is part of what felled him; for me at least, exercise tends to have a rejuvenating effect. Then again, I haven't r

I find it fascinating that the (over)exercise is part of what felled him; for me at least, exercise tends to have a rejuvenating effect. Then again, I haven't run a 50 miler (yet), so maybe I'm just not hitting my limits. Many studies also back that exercise can be an effective treatment for depression. Of course, if you're used to the runner's high and stop getting it because of injuries, that could be a downer.