The phrase "to do another set" means to repeat a specific group of exercises or actions, usually in a workout or training session. It implies that the person should do the same set of exercises one more time before moving on to something else.
Sentences with «to do another set»
Similar prints, or even the same, is a great way of doing sets of clothes. (thefashionfolks.com)
How does a set of plant cells grow from a bump into a flat leaf that can efficiently capture sunlight? (sciencedaily.com)