In order to have good blood, we must breathe well. Full, deep inspirations of pure air fill the lungs with oxygen; purify the blood, sending it-a life-giving current-to every part of the body. Good respiration soothes the nerves; stimulates the appetite; improves digestion; and induces sound, refreshing sleep.
Shallow breathing creates an insufficient supply of oxygen causing the blood to move sluggishly. The waste, poisonous matter, which should be thrown off in exhalations from the lungs, is retained and the blood becomes impure. Not only the lungs, but the stomach, liver and brain are affected. The skin becomes sallow and digestion is retarded. Oxygen deficiency in the cells is known to cause cancer. Experiments have shown that cancer cells cannot live in blood that is well oxygenated.