Set-up: Grasp a pull up bar with one arm and grasp the forearm of that arm with your other hand.
Lift: Bracing through your core, lift yourself up until your chin is over the bar, trying to get as high as possible. Cue yourself to pull your chest to the bar to ensure full height. Be sure to pull through your secondary hand to assist in the lift. Descend all the way to full extension as this will engage more of the shoulder stabilizers and muscle mass of the back - this will help in maintaining health in the shoulder girdle.