Running On Treadmill Vs Outside

running on
A condition of a spark ignition engine in which fuel continues to burn after the ignition switch has been turned off, causing the engine to keep on running. Also called Dieseling.

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