To be more clear.
It is the part of the arm closest to the pit and on the left side.


Any exercises that will work that part specifically?

So I have been working out for about a year. I have downloaded a ton of videos and books regarding fitness/ body building. I haven't really came across an exercise that works out the back of arms... About arms. Big Biceps Huge Triceps Not much muscle at all on the backside/under of arms. Any help wo...