While this is crafted to be humorous, there is more than a grain of truth in the advsibility to extrovert ones’s attention if you feel down. While a run is ultimately desirable (Wingate sprints are apparently the best exercise one can do) I believe it is best to increase one’s activity on a gradient. Start with a walk and look at things while you do.
For more information on Wingate sprints: https://en.wikipedia.org/wiki/Wingate_test