1. Si, a gentle, relaxed exhalation that lets the breath escape between slightly opened lips; it is associated with the lungs.
2. He, a strong breath with open mouth accompanied by a guttural rasping through tightening of the throat at the base of the tongue; it expels heat and aids the heart.
3. Hu, the standard term for “exhale,” is a blowing out of breath with rounded lips; it supports the spleen.
4. Xu, a gentle expulsion of breath with an open mouth; it balances the liver.
5. Chui, a sharp expulsion of air with almost closed lips; it, expels cold and aids the kidneys
6. Xi, traditionally the sound of sighing, is a soft exhalation with the mouth slightly open; it supports the Triple Heater, a unique organ which absorbs qi from food and breath and directs it to the vital organs.