Warnings: Always do the breathing exercise in a safe environment (e.g. sitting on a couch/floor) and unforced. Never practice it before or during diving, driving, swimming, taking a bath or any other environment/place where it might be dangerous to faint. The breathing exercise has a profound effect and should be practiced in the way it is explained. 

The basic technique (without the push-ups) is characterized by cycles consisting of a few minutes of breathing in and breathingout continuously (30-40 times) followed by the retention/exhalation cycle. After every cycle take a deep breath and hold it (inhalation) for another 10-15 seconds .