Sri Tirumalai Krishnamacharya, the father of modern yoga, demonstrating the practices of yoga in 1938 at the age of 50. Hanuman Chalisa by Bhagavan Das.
Sri K. Pattabhi Jois leads Richard Freeman (and others) through third series and part of fourth series in Encinitas, California, 1989. Near the end of the finishing sequence, we find Richard in Padmasana with Jnana Mudra in which he performs only ten full inhalations and ten full exhalations in the span of about three and a half minutes, followed by Utpluthih for ten shorter breaths.
