What the studies are showing is that exercise, at least when performed in a group setting, seems to be at least as effective as standard antidepressant medications in reducing symptoms in patients with major depression,
This was an unexpected finding. There is no obvious explanation.
duration of exercise didn't seem to matter -- what seemed to matter most was whether people were exercising or not.
Social support, peer pressure, family support -- all of that can be helpful, certainly in getting people to maintain exercise.
If you had another 'up' number, that could spook the market.
The focus this week is on Greenspan tomorrow.
The important conclusion is that the effectiveness of exercise seems to persist over time, and that patients who respond well to exercise and maintain their exercise have a much smaller risk of relapsing,