Pro Form Front Runner Treadmill

front runner
The contestant that is leading in a race or other competition
An athlete or horse that runs best when in the front of the field
a competitor thought likely to win
The Front Runner is a small day sailing dinghy. It is a high-performance, responsive, and comfortable one-design class sailboat. It is stable and user-friendly, having an immense cockpit with all control lines leading aft (to the cockpit).
Front-runner is a term to describe the leader in a race, whether political or athletic. The term arose from the close symbolism between political campaigns and athletic running events. The term is used in the U.S.

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 job involving drudgery and confinement
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 device consisting of an endless belt on which a person can walk or jog without changing place
An exercise machine, typically with a continuous belt, that allows one to walk or run in place

pro form
A word or lexical unit that is dependent for its meaning on reference to some other part of the context or sentence in which it occurs, for example, a pronoun replacing a noun or noun phrase, or a verb replacing a clause, such as do in she likes chocolate and so do I
A pro-form is a type of function word or expression that stands in for (expresses the same content as) another word, phrase, clause or sentence where the meaning is recoverable from the context.