Yawning to Wake You Up and Let You Sleep

If you are tired but want to stay awake, the best thing to do is to yawn. During yawning, you breathe in deeply while you hold your facial muscles tightly contracted. Normally, you breathe 15 to 20 times a minute. When you feel tired, you can breathe half as often, and may not get as much oxygen as you need, which causes nerve cells in your brain stem to make you breathe deeper and faster, and your facial muscles to contract in a yawn.

Breathing deeper and faster brings in more oxygen which refreshes you for a few seconds, but it also causes you to blow off way too much carbon dioxide from your bloodstream, which makes you feel dizzy and more tired. So yawing also can help put you to sleep, which is the most effective treatment for tiredness and after you nap, you can wake up feeling refreshed.

Checked 1/9/16

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