HOW: Jump or step up to a pull up bar holding on with a fairly wide grip. While keeping your elbows straight, core engaged, and shoulder blades high, pull your body up just enough to where your shoulder blades rotate back down. Do this in a slow and controlled motion for the prescribed amount of reps.
FEEL: You should feel your shoulder muscles working.
COMPENSATION: Don’t bend your elbows or swing your body forwards or backwards.