Exercise helped me get through some really tough personal problems 5 years ago. I had a lot of anger over the situation that I was in, and exercise was the only thing that helped. These days I am in a career that I have come to basically hate, and the only thing that I look forward to every work day is exercising before I go to the office (and, of course, coming home afterwards!). I find that if I don't work out, I'm crabby at work. And if work threatens to interfere with my exercise--watch out!