In my experience Running can have a similar effect to a nootropic, in that by running my cognitive abilities are enhanced, my mood is improved and I seem to be opened up in a way. Not to be underestimated, brisk physical activity has been proven to increase creativity and intelligence.
Exercise promotes the release of the feel-good chemicals called endorphins. Additionally, like many antidepressant medications, running helps your brain hold on to mood-boosting neurotransmitters serotonin and norepinephrine. For best results, run in quiet, green spaces instead of on crowded streets — a study last year found people in parks experienced brain activity similar to that seen during meditation, while people on streets experienced frustration.