I used to have the same problem. It endured through 8th-10th grade, especially when I lifted weights. I believe that that problem is very psychological.

My remedy was to develop a smooth control of breathing habits. Get a breath of fresh air wherever you can. For me it's outside. Try to inhale and exhale slowly, and meditate like that for a while. Gasping for air is usually uncommon when you're relaxed and meditating, so that's a great way to learn how to control your air intake.

I'd imagine if that remedy couldn't work, then there's a more serious concern at hand, which should be handled by consulting a doctor.

Good luck,
patrick

I experience this sensation too - not being able to take a complete breath or yawn. I've had this as long as I can remember (when I was little I used to be afraid to go to sleep at night because I thought I would stop breathing during the night - I'm 44 now). I've met with a lot of frustration trying to explain this to my doctor (or anyone, for that matter). I've had PFT's several times that came back normal, my blood oxygen content is normal, chest x-rays, lung, etc. I've had pretty much all of it done, but have no answers. I had resigned myself to just living with this. I'm quite active and it doesn't seem to affect my ability to do anything, but it is annoying! There are times when it's worse than others. Today was one of those days, so I did a search for breathing exercises when I came across a post of someone who seems to be experiencing the same thing as me. I'm not the only one?! While I can live with this, I sure would like to find out what causes it and get rid of it if I can!