I have always had a problem with yawning during long meetings (>1 hour) and I am interested in the techniques that people have used to keep themselves from yawning.
I always start to yawn after about an hour into the meeting despite having gotten a good night's sleep and drinking a lot of coffee (or 5-hour Energy shots). I believe the primary reason I yawn may be that I find that the subject matter being discussed is boring and/or it does not pertain to me.
I am also thinking that my yawning problem could be caused instead by my brain not getting enough oxygen since I'm sitting still for a long time and this causes my blood pressure to drop. If this is the case, what techniques can be used to raise my blood pressure and get more oxygen to my brain?
So, what are some techniques that people use to keep from yawning during a long meeting?