Although it’s frequently assumed that yawning indicates weariness or boredom, it’s not always the case.
Despite the fact that yawning may indicate fatigue, yawning causes a sharp increase in heart rate. Given the elevated heart rate, it is possible that yawning can indicate alertness rather than sluggishness.
Why do people yawn?
An uncontrollable response, yawning causes the mouth to open wide and the lungs to take in a lot of air. The air is then slowly expelled. The eardrums may extend during this period, and your eyes may close tightly, causing them to moisten.
The process of yawning is the same for everyone and requires no thought nor activity. Yawning is typically regarded as an indication of fatigue because it frequently occurs before or after sleep. Additionally, those who are engaged in monotonous or dull activities tend to yawn frequently.
Yawning has a social component as well. It appears that yawning spreads easily between people and animals, and yawning’s contagiousness is frequently recorded but little understood.