how to get fuller biceps?
Whats the best exercise for making biceps look fuller and longer? I do alot of concentration curls but i have long arms and its hard to get any size to them. My triceps seem to increase in size alot easier for some reason, and its starting to make my arms look a bit out of proportion. Is it better to do alot of reps with light weights or 8-10 reps with heavy weight? Also ive been told by someone that theres slow twitch and fast twitch fibres in all your muscles except biceps which only have one, so it doesnt matter about doing heavy weights to gain size, is that bull****? Thanx