Some speech therapist recommend to PWS -“Inhale from mouth instead of nose”.
even i was also recommended it by a speech therapist, who proclaimed himself ex-stammerer, but he still stammers . I did it for many years (and i was not useful in stammering also). It is wrong habit of breathing, even harmful for health .
as many of diseases to which civilized man is subjected, are caused by mouth breathing as by mouth breathing, we are bypassing the organs which are protective to dust, impurities, germs and cold air .
if one inhale by Nose, these impurities are stopped and retained by sieves and mucous membrane of nostrils and thrown out by sneezing. But by Mouth breathing, these impurities directly reach in lungs without filtration, cold air harm vocal cords. so Nostril breathing is better then mouth breathing.
in nostril breathing also , people inhale 3 types
1. elevating ribs and raising collar bone and shoulders (more labor, but less air inhales by this)
2. by expanding chest (middle breath)
3. Diaphragmatic breathing or abdominal breathing by expanding by stomach (best as per medical science)
but Yogi complete breathing (Bhastrika Pranayam) include all merits of above 3 breathing exercises. it strengthen whole respiratory apparatus, every parts of lung, every air cell & diaphragm. after 1-2 month practise of Bhastrika Pranayam, diaphragmatic breathing automaticaly start in daily routine if mouth closed.
As per oriental esoteric breath science, air contains oxygen and Prana (energy). oxygen in the air is appropriated by the the blood. Oxygenated blood is carried to all parts of the circulatory system, building up and replenishing. Prana in the air is appropriated by the nervous system, carried to all parts of the nervous system, adding strength and vitality. 75 to 80 percent of our lives is NOT under our control -blood circulation, hearh beating, food digestion etc. Breath is the only nutrition of our body which we can bring under our control and it is the most important nutrition which can link body, mind and soul.
(For more detail, read chapter 6 & 7 of book(link) The science of breath by swami ram charak)
खतरनाक है मुंह से सांस लेना -article
भारतीय योग संस्थान द्वारा प्रकाशित पत्रिका “योग मंजरी” अप्रेल-जून 2016 से साभार