subject: Building The Perfect V-Taper [print this page] To make sure that you achieve bulky rhomboids, thick shoulder muscles, as well as outward growing shoulder muscles, do as many reps with arms gripping close to each other, as you do with arms gripping wide apart from each other. Alternatively make sure that the number of sets for pull downs with arms gripping wide apart are more, say 4 to 5 sets, than the number of sets with arms gripping close together, say 2 to 3 sets. Pull downs are one of those few upper body exercises, for which machines are most suitable, as compared to all other upper body exercises, in which free weights are more superior on any given day.