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Originally Posted by SweetPuff
It would be an interesting Topic to do more research on. I've always heard it had to do with Oxygen and it makes sense to me! I've never had anxiety and if that were the cause then I've had anxiety everyday since I was young!
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Now I'm not saying that everyone who yawns is an anxious person. I frequently yawn also. What I've found with some of my yawns is that I can control them...like just now, I felt one coming on and I stopped it. Maybe swallowing lessens the feeling that you get when a yawn is coming on.
Yawning is frequently attributed to boredom and sleepiness though. It's the body's way of waking the person up a bit.
I think the theory behind the lack of oxygen and yawning is that when you're bored or tired you may be hypoventilating and oxygen levels drop a little and the yawn forced air into the lungs. Sounds completely logical. Studies have proven it wrong though. I believe there was even a study done around 1998 that showed that yawning was unnecessary in adults and children, but that it developed the airways of infants. Interesting...yet so boring.