I have a question about the way to shape my biceps. Right now, they're lean and not very burly looking. I do my curls on one of the seats with the slanted board to rest your elbows on in front, because I find it harder than just doing it standing up (you can't lean over and use your shoulders/back to cheat). Right now, I release all the way until my elbows are locked, and do 10 reps of 60 lbs, because thats all that the front ends of my biceps near the inside of the elbow can take. If I only go down 3/4 was and use more of the middle part of the muscle, however, I can lift quite a bit more. My question is that if I alternate sets, say doing one set at 60 lbs going all the way down and the next set at 80 or 90 going 3/4, will it strengthen or bulk the middle parts of the muscle? Right now it seems only the bottom is doing the work.