*The best time of practice is the early morning, preferably before sunrise, when isdustrial pollution is at its lowest, and the body and brain are still fresh. If mornings are unsuitable, pranayama may be practised after sunset, when the air is cool and pleasant.
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*Panayama is best practised while sitting on the floor on a folded blanket, study chapter 11 on the art of sitting. The posture suitable are siddhasana, swastikasana, bhadrasana, virasana, baddhakonasana and padmasana. However, any other posture will do provided the back is kept erect from the base of the spine to the neck and perpendicular to the floor.