Lois teaches an advanced pranayama class which includes several preparatory poses listed in the Asana List before practicing Viloma 2 and Bhastrika Pranayama. 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.