The title "Power Yoga" itself degrades the depth, purpose, and method of the yoga system that I recieved from my guru, Sri T. Krishnamacharya. Power is the property of god. It is not something to be collected for one's ego. Partial yoga methods out of line with their internal purpose can build up the "six enemies" (desire, anger, greed, illusion, infatuation, and envy) around the heart. The full Ashtanga system practiced with devotion leads to freedom within one's heart.