Hatha yoga taught from 1924 until his death in 1989. Among his students prominent in popularizing yoga in the West were K. Pattabhi Jois famous for popularizing the vigorous Ashtanga Vinyasa Yoga style, B. K. S. Iyengar who emphasized alignment and the use of props, Indra Devi and Krishnamacharya's son T. K. V. Desikachar. Another well-known school of Hatha yoga in the 20th-century has been the Divine Life Society founded by Swami Sivananda of Rishikesh (1887–1963) and his many disciples including, among others, Swami Vishnu-devananda – founder of International Sivananda Yoga Vedanta Centres; Swami Satyananda – of the Bihar School of Yoga;
Ashtanga vinyasa yoga more breaths in difficult postures. Various influential figures have discussed the specific process of breath in ashtanga. Pattabhi Jois recommends breathing fully and deeply with the mouth closed, although does not specifically refer to Ujjayi breathing. However, Manju Jois does and refers to breathing called "‘dirgha rechaka puraka’, meaning long, deep, slow exhalations and inhalations. It should be dirgha... long, and like music. The sound is very important. You have to do the Ujjayi pranayama". In late 2011, Sharath Jois, the grandson of Pattabhi Jois, declared his feelings on the issue, stating that Ujjayi breathing was not done in the