This exercise is intended to separate the movement of the arms from the movement of the ribcage, so that the back is protected.
To do this exercise you will need a mat. Start by lying on your back with your knees bent and your feet planted on the ground. Your hands will rest next to your thighs. Inhale into the ribs as you begin lifting your arms up above your chest, and then exhale to send the ribs towards the pelvis as your arms are descending to the ground behind your head. Inhale into the ribs as you bring the arms back by your side and then exhale again as you lift the arms above your chest before bringing them to the ground behind your head.
Things to think about
This exercise is an important protector for the back. The tendency will be to let the ribs lift away from the floor as your arms go above your head. The rib breath will help alleviate this issue. As you exhale, if you concentrate on getting all of the air out of your lungs then the ribs will be more likely to stay connected to the ground.