I walk on the treadmill too. I can't run as it really hurts my ankles for some reason and I get a bit paranoid
I walk for about 1hr at a brisk pace (not sure what that is in miles). Like little Kitty I alternate between the epilator and the treadmill on different days as well as doing my weights.
I see some others at the gym running like FLAT OUT for an hr or more on the treadmill and I'm like...HECK! I wish I could do that