Biceps, worth isolating?

[Metal85]

I hear from alot of bigger guys that they dont really ever train bis on a consistant basis, more or less just let the back day affect them.
Whats your thoughts on this?

 

[Metal85]

I personally always try to isolate them, however its not like I see any drastic changes with them, they are usually around 18 inches all year, wile on bigger off a lil smaller, doesnt matter how hard I train them or with how much weight, I learned to actually go a bit lighter, as the days with the 45s on each side for preacher curl or standing barbell url seems to merely be a show off move more than a growth exercise

 

[big in vegas]

I used to never train arms period, but now I have my own day for them, just like to change it up