Y-T-W Exercise for Volleyball Shoulder Posterior Activation and Scapular Stabilizing

So I have been training and playing hard now for months in South Africa with little to no shoulder pain. I attribute this to some minor changes I made in my arm swing as well as this great exercise I picked up from the volleyball trainers at Velocity Fitness. Y-T-W is a great volleyball shoulder exercise for posterior activation and scapular stabilizing.