Yep, not even therapy for two years helped much until I started exercising regularly. I think it has really helped my mental outlook... I still have my bad days, but exercising has always been positive for me. If only I could stick to a better schedule...
So on my good weeks, I walk about an hour each weekday (20 minutes uphill and stairs), and do cardio (ergometer) 3 x for 20 mins each. Then I lift 3 x for about an hour each time. So I guess if you add it all up, that's close to 10 hours (including making love, which I count as some exercise!).
Of course, the cardio and lifting bits haven't been consistent for two months now due to vacations and injuries. I treasure my daily walking commute, though, and am so glad that it is halfway uphill (most of the time). No matter how cold it gets, my pulse is always way up there during that part and I start overheating in my warm clothes!