[beezlebroxxxxxx]

If you take a "brisk" 20 minute walk every day, you'll meet the recommended weekly amount of aerobic exercise for Americans. (I think people should do more.)

The actual amount you need to exercise, or the intensity, is not very big. The good thing with exercise is also that once you make it a habit to walk, say, 20 minutes a day, then walking 25 minutes a day becomes pretty trivial, and so on.

[dyauspitr]

Anecdotally, when I’m depressed, a brisk walk does very little. I need to run to the point where I get the endorphins flowing and there is pain from the lactic acid buildup.