Roll up a towel and place it on the floor across the area you will lie on.
Lie on your back with the towel positioned underneath and across your upper back.
Relax in this position, allowing your arms to drop out to the side and your chest to open up, stretching your upper back over the towel.
Remain here for the stated duration, and then move the towel down to the next segment of you upper back, and repeat.
