A student of Swami Kuvalayananda from 1957 until Swamiji’s death in 1966, Sri O.P. Tiwari has dedicated his life to the practice and teaching of Hatha Yoga. Today, at 81, he continues to pass on classical techniques of pranayama to students all over the world. He took over as administrative head of Kaivalyadham Yoga Institute in 1966, a responsibility he passed on to his son Sudhir about two years ago. Photo by Sami.