Well it's not totally crazy. I suffer from mild chronic depression and I have noticed that doing my morning exercise routine makes it much more likely that my mood will be decent throughout the day than if I wake up and decide I just don't feel like exercising that day.
I have also experimented on myself to see whether 30 minutes of exercise improved my mood in the middle of the day. Not totally surprisingly, it _usually_ did. Not always, but usually. It never once had a negative impact.
The main problem is one of motivation/willpower. Telling a depressed person that they should exercise to feel better seems like solid advice on the surface of it, because it stands a high chance of both being true and actually working, BUT they are not in a place to usefully implement the advice. The brain gets in the way and overrides what we see as "common sense." The same way you can't tell an alcoholic to have a nice big steak instead of a beer for dinner. The person usually even knows the "right" thing to do, they are just literally unable to take the right action in the moment.
For running/jogging, a good trick for when you really don't feel like it is to put running clothes on, go outside, and then just start walking. If you still don't feel like running, you can just go for a walk instead, but many people will actually want to run after a bit--the bottleneck is getting out the door.
It's the same for other kinds of exercise. If you're dreading lifting weights, start by just doing some sets of really light reps. If you still feel bad, you can just stop after that, but you'll probably often find at that point that you actually feel like doing more.
Weirdly, I seem to often have my best runs/workouts with this approach, when I started out feeling like crap. Motivation is a strange thing.
Yes to this! Similarly, I got myself out of a rut by buying running shoes that didn't require socks. Totally pathetic, but that was my motivational block.
I have also experimented on myself to see whether 30 minutes of exercise improved my mood in the middle of the day. Not totally surprisingly, it _usually_ did. Not always, but usually. It never once had a negative impact.
The main problem is one of motivation/willpower. Telling a depressed person that they should exercise to feel better seems like solid advice on the surface of it, because it stands a high chance of both being true and actually working, BUT they are not in a place to usefully implement the advice. The brain gets in the way and overrides what we see as "common sense." The same way you can't tell an alcoholic to have a nice big steak instead of a beer for dinner. The person usually even knows the "right" thing to do, they are just literally unable to take the right action in the moment.