Before you finish reading this question of the day, it's likely that you will yawn at least once. Don't misunderstand, we aren't intending to bore you, but just reading about yawning will make you yawn, just as seeing or hearing someone else yawn makes us yawn. The average yawn lasts about six seconds. Your heart rate can rise as much as 30 percent during a yawn. 55 percent of people will yawn within five minutes of seeing someone else yawn.
Blind people yawn more after hearing an audio tape of people yawning.
Reading about yawning will make you yawn. Olympic athletes often yawn before competition. First, let's look at what a yawn is. Yawning is an involuntary action that causes us to open our mouths wide and breathe in deeply. We know it's involuntary because we do it even before we are born.