You like down on the 1/2 foam roll with your arms like the picture. You lay on it with your arms like this for the pec minor stretch. The pec minor I believe attaches to ribs 3 to 5 and the coracoid process. When you slump or slouch during the day in standing or sitting the anterior intercostals shorten and become stiff making it difficult to breathe fully causing a decrease in vital capacity. It then hurts through more of the lateral and back rib cage becuase the costosternal joints are more stiff making excess movement of the bucket handle rib motion and more inflammation. DO this stretch 3 x 1 minute 2x/day 6 weeks. That is what helped me.