Hey guys, usually when i do back, i notice that i use my forearms quite alot, because they get a ridiculous pump and they get really tight. Lately it's been getting worse because i have been going heavier (on cycle). Normally i do either 12 or 15 sets for back. My question is, if i'm trying to gain mass, aren't i suppose to lift as heavy as i can, even if i have to over-compensate a little with other muscle groups ie. forearms? Or should i go much lighter and really focus on form, making sure i only use my back, and no other muscles?