This exercise allows you to do the rib breath with your pelvis lifted away from the ground. This places the body in a position that can facilitate increased breath capacity around the entire circumference of the ribcage.
To do this exercise you will need a soft ball and a mat. Start by lying on your back with the soft ball under your sacrum, which elevates your pelvis away from the ground. Your head and shoulders will be on the ground and your knees will be bent with your feet flat on the floor. Begin the rib breath. As you inhale ask the base of your ribcage to expand in all directions, and as you exhale ask your ribs to narrow towards your spine.
Things to think about
Expanding the ribcage in the back on the inhale can lengthen the tissues that are shortened in some standing postures.