What is the physical limit of how much muscle you can make?

Is there a limit? This is the question posed front and center in Generation Iron 2. Both literally and figuratively – what is the limit of a bodybuilding athlete? In all sports – limits are challenged and that goes for bodybuilding as well. But there is science behind gaining muscle. There are real limits. And this video by Lee Hayward aims to teach you some of the hard facts behind how much muscle you can actually gain in a year. Watch the video above and find out for yourself!