Synonyms for pacemaker

I'm not built for rapid work, but I guess I'll do with you for pacemaker.

Then one will come to grips with life, the pacemaker of style.

It is well known that the pacemaker plays his rôle not only in the field of sport but also in the factory.

Behind a rapidly spinning limousine pedalled a grotesquely humped bicyclist, using the car as a pacemaker.

The inevitable result is that the shovels move with rhythmic precision, and the slowest man becomes the pacemaker for the rest.