This is an easy read, but I will go back to it over and over again for reference. Koch gives good explanations of how the psoas is related to other body systems and functional movement problems. "Awareness" is probably the most important word in the book. As a yoga instructor I work to help students make that mind-body connection, and awareness is a huge part of that. In Part II of the book, Koch provides good explanations and photos of movements that: wake up the core, lengthen the psoas, center & balance the pelvis (and leg muscles), and explore the joints. The final chapter pulls it all together with movements that deepen core awareness --- but be sure to read & do the previous chapters first! Koch has provided information and movement that can easily be incorporated into teaching many types of body movement. -- Linda J., RYT200, RYT500