Ok so, I'm still having problems with my biceps. Today was bi/shoulders. I did regular warm up 25#x15 on ez bar 3x. Then drop sets with 45db 12/10/8/6 8sec rest in between. Seated dB curls 45's again 10/10/8/8. 50# on the ez 4 sets of 21's...not getting results. Some advice pls!