concentrate more on cable pressdowns. i used to do a lot of db extension and the horseshoes got pretty big but my arms still looked small from behind. lately i've been doing a lot of heavy cable pressdowns and clearly my arms have improved big time when lookin from behind. my triceps have gotten wider especially the area near the armpits. but now i have the problems of my arms lookin bad from the side. LOL so now i have to go back and incorporate some db extension again into my tris workout.