Not the person you replied to, but I’ve also experienced depression. Just let me add that exercise doesn’t “feel good” either during or after a workout, but once it becomes part of the weekly routine, yes, let me repeat that- routine - the impact on mental health starts to show as well. It’s tricky because it’s not so much a “positive feeling”, instead, it takes the edge off the blues and anxiety.

I’ve also noticed the thoughts that swim in my head all the time tend to be more positive after a workout. This feels completely out of my control, if you ever tried meditation and found it really hard to clear your mind of thoughts you’ll know what I mean. But, for example, immediately after exercise I have a tendency to think or remember positive moments in my life or positive people. Worst case scenario, if I was on a trend of self sabotaging thoughts or constantly going over resentment and painful memories, those thoughts are likely to stop after a workout for a while. If I really want to I can of course think of whatever I want, but soon again I’ll catch myself with some positive thoughts.

My two cents. Hopefully this adds up.