Even In the Wild Mice Run In Wheels
sciencehabit (1205606) writes "Scientists have found that if they place a running wheel outside, wild animals will flock to it. The researchers observed more than 200,000 mice, rats, and even frogs using the apparatus over a three year period. The findings suggest that like (some) humans, mice and other animals may simply exercise because they like to. Figuring out why certain strains of mice are more sedentary than others could help shed light on genetic differences between more active and sedentary people."
Most of the time I'm sedentary it's because my job has me sit at a desk typing code(or slashdot comments) all day. This is exacerbated for most people, because they attach an hour or more of sedentary driving onto each end.
And being sedentary is mentally exhausting compared to light exercise. It's no surprise that there's an obesity epidemic.
It seems a stretch to jump from "wild mice run in a treadmill" to "mice like to exercise".
What if the treadmill is similiar to what laser pointers are to cats or video games are to humans?
It could be that the mice thinks it's accomplishing something or has some other reason that
it uses the treadmill other than because it likes to exercise.