Bhastrika (pronounced bha-STRI-kaah), is one of the most important pranayamas. It is a very mysterious pranayama and not much is known about it. However, many believe that it is a combination of Kapalbhati & Anulom Vilom pranyamas. It is a breathing technique where breathing is forcible and through the nose, with equal time for inhalation and exhalation. Bhastrika Pranayama is aimed at keeping the inhalation cycle equal to exhalation, yet making breath deeper and longer. Deep breath inwards and long exhalation outwards with equal time intervals constitutes this pranayama technique.
- Physiology of Pranayama, by Dr. M. Hajirnis, Thane, in Yoga Magazine, a publication of Bihar School of Yoga