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    WHY DO I YAWN WHEN I EXERCISE ?

    0  Views: 186 Answers: 1 Posted: 9 years ago

    1 Answer

    People still don't know what is main purpose of Yawning but it's believed to be a physical mechanism that works when one is tired, or bored. When you yawn you inhale a large amount of air which supposed to wake you a bit. People sometimes yawn when they are a bit short of oxygen, for example: when you exercise. Yawning helps the body to restore normal level of oxygen to the body.



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