We may not be familiar with power yoga as it is not fully introduced to us. Power yoga is known as the western version of Ashtanga Yoga which brought by the Indians.
Beryl Bender Birch was the one who gave the term Power Yoga. He was a teacher of Ashtanga Yoga and at the same time an author of Power Yoga.
is known as the 5000 year old system which was used to increase the healthy body, mind and spirit. People who do Hatha Yoga combine the stretching exercises of asanas into their practice. It includes the mental concentration and breathing techniques.