[gamblor956]

Importantly, mice are exercised by being forced to run in wheels, i.e., cardio.

There have been studios in humans showing that cardio exercise has mental benefits, presumably in part due to increased blood flow to the brain. And anecdotally, among knowledge workers like lawyers and doctors, cardio exercise is disproportionately over-represented compared to average populations.

[chiefalchemist]

The last bit is interesting. But ya have to wonder which came first...the runner or the knowledge worker. Know what I mean?