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Yawning primarily acts as a bizarre jaw stretching motion

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Despite the popular myth, yawning isn't a desperate gasp for more oxygen. It acts more like a complex stretching mechanism that forces the jaw muscles to reboot and temporarily flushes stagnant fluids out of the surrounding facial tissues.

From the Stacky collection1 min read
Yawning primarily acts as a bizarre jaw stretching motion
STACKY / Health
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