Motorized Treadmill

motorized
Equip (a vehicle or device) with a motor to operate or propel it
Equip (troops) with motor transportation
(motorize) To fit something with a motor; To supply something or someone with motor vehicles; To supply armoured vehicles; to mechanize
equipped with a motor or motors; "a motorized wheelchair"
mechanized: using vehicles; "motorized warfare"

treadmill
a mill that is powered by men or animals walking on a circular belt or climbing steps
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
A job or situation that is tiring, boring, or unpleasant and from which it is hard to escape
an exercise device consisting of an endless belt on which a person can walk or jog without changing place
a job involving drudgery and confinement