The phrase "mass builder" refers to something that helps increase the size and strength of muscles. It often refers to exercises, supplements, or routines that focus on gaining muscle mass. Full definition
The best mass builders for shoulders are pressing exercises like military press, and dumbbell press, while straight arm raises work better to isolate the individual heads. (bodybuildingforyou.com)
This workout is designed for beginner bodybuilders as it includes the best mass builders. (exercisegoals.com)
If I have a fully stocked gym at my disposal with every tool imaginable, where do bodyweight exercises fit in and which are the most effective as mass builders? (musclebuildingsummit.com)