Why Do We Yawn?
6. Waking Up
When we wake up in the morning, one of the first things we are likely to do is stretch. This helps to shake off any aches and pains in our muscles and helps to prepare our muscles for the day ahead. In addition, you may also find that one of the first things you do is to yawn.
Yawning in the morning may be a way to help kick-start our bodies and our brains into waking up. Yawning can help to stretch the lungs after hours of relatively shallow breathing and it can also allow for other muscles to be stretched.
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