when you yawn are you breathing in or out?
Actually, yes it is in... BUT, you do breathe out too at the end!!!
The 7th word of you question is the answer
Your breathing in a first then you breathe out.
You are inhaling.
Both is what we always need to do.
You inhale until you can't fill your lungs any more, then exhale.
A yawn is your bodies way of trying to get more oxygen. It happens when you are tired, nervous, or simply breathing too shallow.
In because a yawn is your bodies way of getting more oxygen to your brain because you are tired