All of Lois' Advanced Classes include a sutra study. This class discusses sutra II.49, followed by several preparatory inverted poses (see pose list below) before practicing pranayama, including Ujjayi with retention after the inhalation and exhalation, Viloma and Nadi Shodana. Pranayama class affords those people who are seriously interested in working with breath an opportunity to move beyond the elementary levels that have been incorporated into the regular asana classes. A minimum of one year of study and practice of asana in the Iyengar method is required before practicing Pranayama. Advanced Pranayama classes are for students who have completed the preceding levels. Pranayama with a reputable teacher is highly recommended before purchasing an audio-only download.