They also know that the breath so retained gathers up all the waste matter, and when the breath is expelled it carries with it the effete matter of the system, and cleanses the lungs just as a purgative does the bowels.

The Yogis recommend this exercise for various disorders of the stomach, liver and blood, and also find that it frequently relieves bad breath, which often arises from poorly ventilated lungs.

We recommend students to pay considerable attention to this exercise, as it has great merits.

The following directions will give you a clear idea of the exercise: (1) Stand erect.
(2) Inhale a Complete Breath.
(3) Retain the air as long as you can comfortably.
(4) Exhale vigorously through the open mouth.
(5) Practice the Cleansing Breath.
At first you will be able to retain the breath only a short time, but a little practice will also show a great improvement.

Time yourself with a watch if you wish to note your progress.
(2) LUNG CELL STIMULATION.
This exercise is designed to stimulate the air cells in the lungs, but beginners must not overdo it, and in no case should it be indulged in too vigorously.