Learn all about the versatility of the psoas in this short course that`s designed to help you understand the function of this major muscle in your yoga practice and in your overall well-being. Jo Ann Staugaard-Jones, professor of kinesiology and author of The Vital Psoas Muscle, begins with an introduction to the anatomy of the psoas and the connective tissue that surrounds it and to the many ways we can stretch, stabilize, and strengthen the psoas in yoga.