Don't automatically use a wide, medium or narrow grip - Just use the grip where your hands land at after you've fully rotated or turned your hands all the way around so your palms are facing away from you (watch the video above again if you don't understand) and...
When you do barbell curls like this...
You shouldn't experience any forearm pain because your hands and biceps will both be in stronger positions that will put less stress on your forearms but to really get bigger biceps...
hi adrian, i just sent you a message on utube. i am wondering if i may speak with you. i also want to know...how can i do the butt excercise at home....i have no weights etc. but can get some. what should i get?
appreciate it very much! thanks... 
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