Quote:
Originally Posted by
imageWIS 
I normally just try to increase my chicken breast, egg white and flax seed oil intake. The worse thing is that I can't get my arms / shoulders bigger. I get stronger and can curl more weight, but I really don't get bigger. Whereas my legs, back and chest get bigger with the same amount of effort I use on my arms.
Doing it wrong. If you want to hit 20" arms, you need to do heavy tri work. That's where the growth potential is. Triceps are much larger than biceps, and your leverage is much better; ergo, tri gains far outclass bi gains. Heavy dips, heavy skulls, and heavy-ass bench. Curls are just the icing on the cake.