Assertion: yawning | /r/ObjectUse | used to combat stress
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Source sentences:
text: Studies have also been done with athletes (who are in top shape) & it has been noticed that just prior to an athletic event they are participating in, they will yawn, so the oxygen intake in this scenario, didn't really fit, scientists are now beginning to believe that yawning can be used for different purposes ~ the oxygen intake being one, in the case of the athletes, they believe yawning can also be used to combat stress, providing a stress relief reflex mechanism.