Shaping the biceps and wtf am I doing wrong??

[The Alpha...]

This is gotta be my toughest part... For some reason I'm feeling it's impossible to get a decent shape to my bi's... I have the girth and thickness I'm wanting.. (19-3/4" on a good day) but I just for some reason cannot get the definition or striations I'm wanting. I feel like my skin in my bi's is so thick and u can't see any vascularity on them at all. I don't have this issue with any other body part just the bi's. I'm hitting them hard on Tuesday's
Preacher curls 12-15 reps x's 4
Standing db curls 12 reps x's 4
Standing barbell curls 12 x's 4
Concentration curls 15 x's 3

Saturday I do the same as above but only 3 sets.

Any advice, critique or recommendations??

 

[bigpokey]

prolly cause a bunch of 12-15 rep sets is for a swimmer or fgt

 

[bigpokey]

in before your banting 2day!

 

[The Alpha...]

in before your banting 2day!

Why am I gonna get banned again today?

 

[The Alpha...]

If I'm working on vascularity then I need the higher reps??? I got decent size... Need to shape em up.

 

[burnthiscorpse]

prolly cause a bunch of 12-15 rep sets is for a swimmer or fgt

dayumm......

 

[The Alpha...]

Does anyone got any recommendations worth a chit?

 

[ksrcrider]

How is your diet? Do you do any cardio?

 

[kiai]

lose more bodyfat.

add some cardio to your routine if you dont have.

through in some very high rep sets at the end of your workout to maximize blood flow to those muscles and strengthen your blood vessels.

if that wont get you some vascularity I dont know what will.

 

[The Alpha...]

Man, my cardio kinda sucks.. I swim on the weekends but I can't get on a treadmill.. It bores the shit outta me... My diet is great! 4k calories 3-400 grams protein ed... I'm at bout 15% bf so I'm not fat really at all.