Treadmill Belt Slipping

belt slipping
(Belt slip) The speed differential between the belt and the pulley surface.
(Belt slip) When a drive belt is not as tight as it should be, it will slip on the pulley and thus will not transmit power. If a driven pulley is seized, the belt will also slip.

treadmill
an exercise device consisting of an endless belt on which a person can walk or jog without changing place
a mill that is powered by men or animals walking on a circular belt or climbing steps
A job or situation that is tiring, boring, or unpleasant and from which it is hard to escape
a job involving drudgery and confinement
An exercise machine, typically with a continuous belt, that allows one to walk or run in place
A device formerly used for driving machinery, consisting of a large wheel with steps fitted into its inner surface. It was turned by the weight of people or animals treading the steps