Agnisar Kriya | Yoga pour les débutants complets | Yoga For Menstrual Disorders in Frenchbr br Agnisara Kriya is not strictly one of the 6 main Hatha Yoga Kriyas but is the preliminary practice for Nauli - churning of the stomach muscles. It's good to practice Agnisara Kriya for a few weeks to strengthen the abdominal muscles for the practice of Nauli.