Zen & Horseback Riding explains the location, importance and use of the psoas muscles. The psoas are the deep core muscles that link the upper and lower girdles of the body. They are the basis of all efficient body movement and can be used by everyone in any athletic activity. This book explains how to use your body to achieve tone, find self-carriage and to move correctly both on and off the horse. The 4th Edition includes updates and adds pictures that match the information Tom currently presents in his Rider Seat clinics in the US and Europe. Zen & Horseback Riding is about using horseback riding as a means of self-development and training. It is about improving both your riding and your life.