I am guessing that this study only concludes that aerobic exercise helps to stop depression. I wonder how aerobic exercise like weight lifting effects depression.

I have always been told about the runner’s high. It is believed that the body elevates dopamine in the brain after long bouts of exercise. This could be the anti-depression the study is talking about.

Personally I hate to run long distances.
When I have to, I usually just thing about my beautiful girlfriend.
That usually cheers me up, but I don’t know if I would call that the runner's high.

Dr.Max