HOW: While standing, grab onto a dowel behind your back with your palms facing forward. Use one arm to push the dowel back in order for the other shoulder to feel a stretch without it working. Hold that stretch for the prescribed amount of time.
FEEL: You should feel a stretch in the front of your shoulder.
COMPENSATION: Don’t bend your hips forward, stay standing straight up. Don’t let the shoulder that you are trying to stretch work much, let the other one do the work.