Who invented the power yoga?

Two American yoga teachers are most often credited with the near simultaneous invention of power yoga: Beryl Bender Birch, based in New York, and Bryan Kest, based in Los Angeles. Not coincidentally, both these teachers had studied with Ashtanga master Sri K. Pattabhi Jois. Using the term power yoga differentiated the intense, flowing style of yoga they were teaching from the gentle stretching and meditation that many Americans associated with yoga. Another name often associated with power yoga is Baron Baptiste. Baptiste has his own method, which is only taught by teachers he certifies.