3. Join the lips in such a way that a small opening remains in the middle and throw only a small quantity of air violently through this opening; retain the respiration, again throw out a little air in the same way; retain again, and so forth, in the same way, until the lungs are completely emptied of air.
4. Take a shorter but deep breath, lasting from three to five seconds.
This exercise acts as a washer and cleanser of the lungs in forcing the pure air into the corners of the lungs and pushing out the foul air accumulated.
The Special Deep Breathing Exercise
No. II
Position.—Standing or sitting erect, with shoulders back, but without strain, arms hung loosely downward to sides.
1. Inhale as deeply as possible.
2. Retain the air in the lungs as long as possible, without strain.
3. Exhale the air vigorously through the open mouth.
This exercise has a beneficial influence upon the system of respiration, the blood and the nervous system.