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,

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,

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.

It is true that so far as wealth gives time for ideal ends and exercise to ideal energies, wealth is better than poverty and ought to be chosen. But wealth does this in only a portion of the actual cases. Elsewhere the desire to gain wealth and the fear to lose it are our chief breeders of cowardice and propagators of corruption. There must be thousands of conjunctures in which a wealth-bound man must be a slave, whilst a man for whom poverty has no terrors becomes a freeman.

I recommend it to my patients as an exercise.