Bro and thats like a no brainer. Why slack off on your arms? " It's a waste of time" Thats like the dumbest thing ive ever heard said about working out, espically a muscle as complex but yet so needed as the bicep. Those are some ignorant words, if I could quote Arnny for a sec. He said "train your weakest muscle as if it was your strongest muscle." Cowshit here and the rest of the lil "crew" of non bicep ppl need to stop slacking off on bicep and work it out. Because ask anyone in the gym that knows what there doing, pulling exe are not enough to sculp your biceps.