Sit in a comfortable Asana. Breathe in through both the nostrils forcefully, till the lungs are full and diaphragm is stretched. Then breathe out forcefully also, but see that the abdominal cavity does not blow up due to the air breathed in. Depending upon the capacity and health of an individual, this Pranayama can be done in three variable speeds viz. slow speed, moderate speed and at high speed. Individuals with weak lungs and heart should do this at a slow speed while performing Recak and Puraka A healthy individual and one used to doing it, should do it initially at a slow speed and then gradually increase the speed to moderate and then high. This Pranayama should be done for 5 to 10 minute

Shiva Sankalpa (Vow) at the time of performing Bhastrika:

While inhaling in the process of doing Bhastrika make a vow and focus in your mind as if all the divine powers, purity, peace and joy, all that is good in the universe around you is entering inside your body and that you are getting filled with the divine powers. Pranayama done with this kind of vow in mind imparts a special benefit to the individual.

Benefits:

Diseases like cold, cough, allergy, asthma, respiratory diseases of all kinds, are cured. Lungs become strong and due to the heart and head getting adequate quantity of pure and fresh air, health is improved. Diseases of the throat like thyroid, tonsils and other ailments of throat are cured.