Place the large roller against the lower rib cage in back and lean over to one side and allow the roller to press, roll and massage the lower ribs on that side and then the other. Feel for where there may be ache and stiffness in the ribcage and massage and roll for relief. The diaphragm attaches all around the inside of the lower ribs and then to the first 3 or 4 lumbar vertebrae via tendons (the crura). If it is chronically tense and short (as it is in many of us) it will eventually strain and distort the whole middle region of the back and trunk of the body. Press, roll, and massage those areas that feel stiff, achy, and tense in the ribs in back. Sense how the breathing eases and deepens as you relieve the stiffness and the ache.