But one should inhale a series of full Complete Breaths several times a day, whenever opportunity offers, in order to keep the system in good order and condition.
The following simple exercise will give you a clear idea of what the Complete Breath is: (1) Stand or sit erect.

Breathing through the nostrils, inhale steadily, first filling the lower part of the lungs, which is accomplished by bringing into play the diaphragm, which descending exerts a gentle pressure on the abdominal organs, pushing forward the front walls of the abdomen.

Then fill the middle part of the lungs, pushing out the lower ribs, breast-bone and chest.

Then fill the higher portion of the lungs, protruding the upper chest, thus lifting the chest, including the upper six or seven pairs of ribs.

In the final movement, the lower part of the abdomen will be slightly drawn in, which movement gives the lungs a support and also helps to fill the highest part of the lungs.
At first reading it may appear that this breath consists of three distinct movements.