Breathing through the nose produces Nitric oxide (NO) which improves oxygen delivery into the lungs by causing bronchodilation.
Exhaling through the nose takes redirects Nitric Oxide way from the lungs, so exhalation should be through the mouth.
See article: https://apple.news/Al5M4pfv0TICzbN7RjQydMg
I have just finished a recording a 50 minute interview on the Amatsu Tatara (天津 蹈鞴) and the ‘Life Secrets of the Amatsu Tatara’ book, for my dear friend Pedro Fleitas, which was kindly translated by Dr. David Palau.
I am very grateful Pedro for inviting me to speak about the Amatsu Tatara and to David for his expert translation.
The interview was quite informal, but I hope that (within the constraints of the time available), it will provide an some additional insights into the subject
As I understand it, the interview should air on instagram at 11am (UK time) tomorrow - 27th April 2020 and hopefully be available on Pedro’s ‘YouTube’ channel: https://www.youtube.com/channel/UC7l1e2pbBD7qJFlwtxOBA7g/videos?fbclid=IwAR24gnKmufrSoZKVGz9ay0QXakJ73qEqWE60PuPFlaIl9wgf1JjwWQSKYBo