Why do I always start yawning ...

I have no clue why, because I do it also!! It never fails to happen.

dehydration??

I used to do it on the warm up of P90X2, but after a couple of minutes it would pass.

Is it your body calling for more oxygen but not warmed up properly?

Russ.

Edit: I agree with Rockchalk lmao

Here is a little something about yawning. Kinda interesting if you think about it.




Everybody yawns — from unborn babies to the oldest great-grandparent. Animals do it, too. But why, exactly, do people and animals yawn? No one knows for sure. But there are many theories (ideas) about why people yawn.

One is that when we are bored or tired, we just don't breathe as deeply as we usually do. As this theory goes, our bodies take in less oxygen because our breathing has slowed. Therefore, yawning helps us bring more oxygen into the blood and move more carbon dioxide out of the blood.

Yawning, then, would be an involuntary reflex (something we can't really control) to help us control our oxygen and carbon dioxide levels. Sounds good, but other studies have shown that breathing more oxygen does not decrease yawning. Likewise, breathing more carbon dioxide does not increase yawning. Hmmm. Now what?

Another theory is that yawning stretches the lungs and lung tissue. Stretching and yawning may be a way to flex muscles and joints, increase heart rate, and feel more awake.

Other people believe that yawning is a protective reflex to redistribute the oil-like substance called surfactant (say: sur-fak-tint) that helps keep lungs lubricated inside and keeps them from collapsing. So, if we didn't yawn, according to this theory, taking a deep breath would become harder and harder — and that would not be good!

But there is one idea about yawning that everyone knows to be true. It seems contagious. If you yawn in class, you'll probably notice a few other people will start yawning, too. Even thinking about yawning can get you yawning. How many times have you yawned while reading this article? We hope not many!

That used to happen on my recumbent bike. Sometimes I find that taking deeper breaths helps. Sometimes I have days where I just can get a satisfying yawn and end up yawning for an hour or two. And sometimes I'm just tired.

I do it about 15 mins into lifting weights..just needing more oxygen.

I agree with the people who talk about taking more oxygen in. I have asthma and I always wondered why I yawned so much when I was neither tired or sleepy. It wasn't until I was nearly 50 that a doctor explained it to me. After I knew, I definitely saw the pattern and it was when I needed air.

Just seeing the word "yawn" makes me yawn. I've probably yawned seven or eight times just reading this thread! LOL. I also yawn sometimes during my workouts too - glad to know it isn't just me!

Here is a little something about yawning. Kinda interesting if you think about it.




Everybody yawns — from unborn babies to the oldest great-grandparent. Animals do it, too. But why, exactly, do people and animals yawn? No one knows for sure. But there are many theories (ideas) about why people yawn.

One is that when we are bored or tired, we just don't breathe as deeply as we usually do. As this theory goes, our bodies take in less oxygen because our breathing has slowed. Therefore, yawning helps us bring more oxygen into the blood and move more carbon dioxide out of the blood.

Yawning, then, would be an involuntary reflex (something we can't really control) to help us control our oxygen and carbon dioxide levels. Sounds good, but other studies have shown that breathing more oxygen does not decrease yawning. Likewise, breathing more carbon dioxide does not increase yawning. Hmmm. Now what?

Another theory is that yawning stretches the lungs and lung tissue. Stretching and yawning may be a way to flex muscles and joints, increase heart rate, and feel more awake.

Other people believe that yawning is a protective reflex to redistribute the oil-like substance called surfactant (say: sur-fak-tint) that helps keep lungs lubricated inside and keeps them from collapsing. So, if we didn't yawn, according to this theory, taking a deep breath would become harder and harder — and that would not be good!

But there is one idea about yawning that everyone knows to be true. It seems contagious. If you yawn in class, you'll probably notice a few other people will start yawning, too. Even thinking about yawning can get you yawning. How many times have you yawned while reading this article? We hope not many!

I yawned twice while reading your post. It is very contagious! Haha. How weird is that?! Another thing, sometimes when I yawn, I get a killer cramp on one side under my jaw bone. My dad does too. It hurt super bad so if I feel like the yawn is going to make it cramp again, I do my best to avoid it. Haha

You're not breathing enough while you're doing the work out. Focus on making sure you breath instead of holding your breathe!

Yep, you're not getting enough oxygen. And be sure to exhale ALL THE WAY OUT. A pulmonary therapist says that is a common oversight when you need to monitor your oxygen, whether from exercise or from disease.