I have done yoga for 33 years, mostly Iyengar-based, but also Ashtanga, “Y” classes, gym classes, Yin yoga, Flow yoga, Vinyasa Krama yoga, Relax and Renew yoga and one Bikram class. I’ve read Yoga Journal, International Yoga and many books by various practitioners. Though I’ve heard many times about the ancient origins of yoga—some teachers . . .