With Thom Birch and Beryl Bender Birch The only program of its kind, Power Yoga for Runners is your opportunity to learn a highly dynamic and balanced yoga routine that Thom Birch has practiced and taught since 1982 in his work to help runners worldwide. This 30-minute yoga practice is the perfect routine for all students, both new and advanced, who want the benefits of Astanga Yoga. $21.00