well, 2 decades of training... that gives a shitton of muscle quality...
imo muscle QUALITY is tied to lifting heavy for a long long time...
and theres a limit to size training naturally, muscle quality gets better and better the longer you train imo, even naturally...
the other way around its the same, you can get huge as fuck within a short time frame, but youll be blown up and lacking muscle quality.. (see phil heath, cant spot a single muscle fiber on his body vs some natty guys whove been working out for 20 years...) (inb4 affeman posts pics to kiss phils ass)
i know a guy whos accused of being on the juice by EVERYONE, yet hes natural...
hes been training focused for 10 years now... guy is around the same size as i am, same height, at the same weight he looks like shit when bulking up and could never ever get close to what i look like on a ton of juice... he also trains powerlifting style and gets distustingly fat in the off season...
BUT... and heres the BIG BUT:
when he cuts down he looks insane, stays dense and full, he just got the dense quality muscle fibers from a decade of heavy training...
his body is a wreck at 28 years old from powerlifting style training, but when he cuts down he looks insane, blows away 95% of guys on the juice at my gym.