Tread Mill

So I have discovered a new machine at the gym and that is the Tread Mill. I know it sounds a bit weird but  I can assure you its True. In our Gym there are two levels. At the bottom is all the cardio machines and at the top is all the weights and tread Mills. Now before you all or too excited I only walk on the Mill quite fast. I certainly don't run on it. I don't really want to exert Myself like others do. I really don't want to appear all muscle bound. I just want to be normal. So that the reason for all of that.