Another word for Raise and Lower

Solution 1:

He lifted the dumbbell to shoulder height and then pumped it to the arm's full extension five times.

Bafflingly, I am not finding the relevant definition in any dictionary. But pumping involves a repeated back and forth, or up and down, motion. Literally speaking, the purpose is in order to get a system to a certain state, for example, to get enough air into a bicycle tire.

Think of pumping the brake when you hit an icy patch of pavement.

Solution 2:

The word you are looking for may be repetition.

From Oxford Dictionaries:

repetition: a training exercise that is repeated, especially a series of repeated raisings and lowerings of the weight in weight training.

Note: I acknowledge that @bib mentioned repetition (and rep) in a comment on the question. I didn't see it. I work with some weightlifters and repetition came immediately to mind.