I think theres a place in everyones training routine for sloppy form to move heavy weight. I do remember when Ronnie stated in Flex that "cheating cambered bar curls are the best bicep mass builder." And i totally agree, when training back i like to warm up with some strict cable rows then hit the bent over rows hard and heavy...and if i have to sacrifice form then so be it...just move the weight. Youve got to remember that when you put that extra stress on you body then you break down more fibers, and that means you grow.

With biceps i love to start off with some cable curls and get a good deep burn, then move on to heavy ass cambered bar curls, or straight bars curls. I like to keep my first few sets kind of strict, but the last few just load the bar and hold on for the ride...get the bar to move thats my only goal.

Now that is granted that you keep "somewhat" of a form so you stress the muscle...but i belive some cheating is essential.

I think the pros cheat to gain more mass, they are already symetrical, more size will win the O