Okay, I've been working so hard on my chest and it doesn't seem to want to grow at all. I have little improvment on bench press and my chest is just not growing. I'm doing GoPro's power/rep/shock routine's and everything else seems to be doing great except my chest! Please help out, I'm thinking about training my chest twice a week. What do you guys suggest? I'm 16 (17 in May) 5'8-1/2 and 143lbs. I mostly have no body fat and am mostly build of muscle for some reason I can't gain any bf. Maybe that's my problem?