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leshawatts2002
Why do I yawn all the time, I am not even tired?
I mean I yawn all freaking day! I cant stand it!
                     




kliving27
Rating
It's a lack of oxygen (i've heard). Maybe try taking more deep breaths.


bryan
Rating
Start a regular exercise routine and take a good multi-vitamin. Also try to get more fresh air.


BritMarie
Rating
your brain needs more air than what it's getting.


icee85_76
Rating
People also yawn when their brain isn't getting enough oxygen.


Always Right
Rating
It's a genetic condition affecting most females, whereby they just can't keep their mouths shut! :P


pendlewrenn
Your low on oxygen, try more exercise to increase lung capacity, it sounds like you are not using all of yours :)


wldwon2003
Rating
you yawn so your body can get more air


3dollarwhale
Rating
I know I have a habit of yawning a lot when I am anxious or excited. It's like a nervoud tic. Perhaps you are like me!


kalenascruggs
Rating
when I'm not tired, usually seeing someone else yawn sets off this chain reaction type thing and next thing ya know everyone is yawning...

Kalena


bukroot
i find that i yawn an unusually large number of times when i'm excersizing or stretching in any way. yawning is the body's way of relaxing the muscles in the jaw, so there you have it! maybe ur just tense...


alcshorty1990
its cuz of a lack of oxygen......


rahul_hyd
You need to walk in fresh air more often.


California Bear
Rating
The exact reason is not known but there are a number of theories:

1) Excess of carbon dioxide and lack of oxygen in the blood. The brain trieggers a yawn to expel carbon dioxide and inhale oxygen.
2) Regulation of body temperature.
3) An increase of certain neurotransmitters in the brain, specifically serotonin, dopamine, glutamic acid and nitric oxide.
4) A yawn is similar to stretching in that it increases blood pressure and heart rate and also flexes many muscles and joints


lasherx2004
Here are some theories:

The Physiological Theory -- Our bodies induce yawning to drawn in more oxygen or remove a build-up of carbon dioxide. This theory helps explain why we yawn in groups. Larger groups produce more carbon dioxide, which means our bodies would act to draw in more oxygen and get rid of the excess carbon dioxide. However, if our bodies make us yawn to drawn in needed oxygen, wouldn't we yawn during exercise? Robert Provine, a psychologist at the University of Maryland, Baltimore County, and a leading expert on yawning, has tested this theory. Giving people additional oxygen didn't decrease yawning and decreasing the amount of carbon dioxide in a subject's environment also didn't prevent yawning.

The Evolution Theory -- Some think that yawning is something that began with our ancestors, who used yawning to show their teeth and intimidate others. An offshoot of this theory is the idea that yawning developed from early man as a signal for us to change activities.

The Boredom Theory -- In the dictionary, yawning is said to be caused by boredom, fatigue or drowsiness. Although we do tend to yawn when bored or tired, this theory doesn't explain why Olympic athletes yawn right before they compete in their event. It's doubtful that they are bored with the world watching them.


MOM OF ONE
it is because you are lacking oxygen in your brain...it is true I swear. Yawn allot for it won't hurt you just help.


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