RiderPilates, owned by Beth Glosten, MD, in Redmond, WA, is a pilates studio geared to the horseback rider. Beth offers private pilates sessions on machines, and small group classes using exercise balls and other props. Beth also teaches rider position-focused riding lessons in her covered arena, or will come to you. She also travels to teach clinics.
View website for details about her book, The Riding Doctor and DVD, Ride in Balance.