My son purchased the Power 90 Training System, and I borrowed the Yoga program a few times, until I decided to purchase my own copy of Yoga X. This 90+ minute workout is wonderful -- emphasizing strength, flexibility, endurance, while acknowledging breath and contrasting effects of Yoga's affect on the body's Yin and Yang. Yoga X is a guaranteed sweat!
I don't believe that one may purchase individually the Yoga X program from the main Internet site. I was provided telephone numbers (1- 800-454-BODY, 1- 866- 737 9407, or 1- 866- 360 8282, Monday - Friday, 6 am - 6 pm, Pacific, Saturday - Sunday, 7 am - 3 pm, Pacific.), through which I made my purchase.