This morning while I was experimenting, I found a way to stretch the layer of scar tissue in my back.
1) Sit with your feed flat on the floor on the edge of a chair
Then cross one arm over the other as demonstrated below.
Notice how my shoulders are straight and level?
2) Hunch the shoulder of the extended arm in towards the body and bring the extended arm in towards the opposite elbow as seen below. This stretches the muscle and scar tissue on the corresponding side. Hold this stretch for 30 seconds then slowly release.
3) Repeat for the opposite side.
4) To Stretch the entire back, hunch both shoulders in towards the body, bow head forward and cross both wrists in front of the center of the chest with elbows bent at nearly 90 degree angles as seen below. Hold for 30 seconds, then release slowly. Repeat.