According to Osho, it is a gradual method. Fast breathing belongs to the step-by-step path: you can practice for an hour and live your worldly life the rest of the day. Sudden techniques demand total renunciation and complete preparedness, otherwise they can be dangerous. Gradual practice ripens you quietly, until one day a transformative ‘rebirth’ happens.
Fast breathing is a gentle, do-it-daily method—you don’t need to give up your life; just practice steadily and let change grow.