Yawning breathing out

[marmaduke]

Is a yawn a long breath in? My friend Keith often finds that he is actually breathing out all the way through it.

[artee]

The old belief was that people who are short of oxygen would take in these great amounts by yawning.
The latest theory, which makes more sense to me as I know that we breathe in well enough, is that there is a build up of excessive carbon dioxide in our lungs, (because we are not exhaling to the full potential), so we are forced into taking in a large amount of air, and this in turn forces out a good amount of carbon dioxide. Sometimes we have to do lots and lots....

[Scarlett]

Well my students yawn all the way through my lessons- not because I am so boring, but because that's what happens when you sing properly!!