Blue chart showing decreases intention, depression, anger, fatigue, and confusion, and large increases in vigor and friendliness after a 45 minute walk.
Just a reminder from my N of 20 health psychology class who completed the POMS (profile of mood states) before and after a 45 minute walk along the Mississippi River: taking a walk outside is good for the mood, with the effect sizes on par with a 12 week training in meditation or yoga.