Pranayam is breathing rhythmically with the aim of getting the maximum of energy from the immediate surrounding. Minimal muscular activity can give all the benefits.
A normal person inhales and exhales 15-18 times in a minute. The amount of air inhaled is half a litre. The exhale volume is 1.5 litres. This capacity should be increased to get the maximum benefit. Through pranayama, the intake quantity of air ( prana or energy) oxygen increased, and the blood purification takes place due to oxygenation. The increased quantity of oxygen gives more energy called ATP ( adenosine triphosphate).
With practice, the intake of oxygen can be increased ten times. As a result, the cells get more energy. Thus, pranayama is very good anti-oxidant. Pranama results in a reduction of necrosis. Necosis is nothing but the cells or tissues destruction due to infection, toxins, or trauma.
Pranayama ( Kapalbhati, anulom-vilom, and bhastrika) must be performed under expert guidance during an initial stage or the introductory session of 6-7 days.
As per experience the breathing practice with a positive set of mind or emotions will do wonders. As one starts thoughts can wander, and it will be easy to concentrate by focusing on the breath. The breath should be slow and steady and rhythmic. Ensure to take the same amount of air and exhale the same amount.
Being regular is another requirement. Before commencing One should free the stomach. A neem water enema is a good way to start. Sit comfortably in a pose to which you are accustomed to and start getting all the benefits.