is there a secret to getting that vein along your bicep to pop out?
i'm 90 kilos and can do 22.5kg dumb bell bicep curls or 55kg for bar bell curls but yet still don't have that bicep vein
i think my biceps are fairly strong for my size (please correct me if i'm delusional) and i have loads of veins from the elbow down but no bicep vein.

what gives?