The Rotator Curl exercise works your shoulders using a body bar.
-All right, we're going into the rotator curl. You're gonna take your bar perpendicular to the grounds. Your elbow is gonna be at a 90-degree angle, shoulders down. You're gonna take it all the way out to the side like opening up a door, back to center, all the way out, back to center, making sure your elbow is glued to the side of your stomach the entire time, then you can switch over to your left hand and do this side. Three sets of 15.