We used to have a treadmill and we used it quite a bit, but I never got over that feeling like I was a hamster in a wheel. Eventually we used the treadmill to hang laundry on until one day it finally broke down when we tried to use it again.
I share my "treadmill" with joggers, hikers, backpackers, bikers, dogs and bears. Well, I've never actually seen a bear out there, but I have seen evidence that they have been there, if you know what I mean. A storm was moving in when I turned around and headed back east today. This is what it looks like most afternoons here during our monsoon season.