YAS offers three levels of YFA® classes. All are challenging yet uncomplicated, safe, fun and effective, allowing you to concentrate on getting a great yoga workout. All Levels —Take it to your level in a straightforward yet strenuous class open to all levels. Level 1-2 — Get back to the basics with extra time spent breaking down poses from All Levels class. Level 2-3 — Bump it up with a faster-paced class featuring more advanced poses—and more sweat!