The practice begins at 15 min. The first fifteen minutes of this class describe the details and techniques of The Four Purifications as taught by Baba Hari Das as an introduction to Pranayama. Nadi Shodhana (alternate nostril breathing), Kapalabhati (skull shining), Agnisara Dhauti (fire wash) and Ashvini Mudra (horse gesture). Practiced in this order, they have a powerful effect to balance the energies, clear the mind, digest physical & emotional matter and raise energy levels. **Not suitable for pregnant or menstruating women **