Hi Gabriel,

I have had the same exact problem for over about 10 years now, except I'm not a runner. But the same shortness of breath feeling, sensation of not getting a full satisfying breath, excessive yawning, and even tingling of my lips and fingertips. I've gone to numerous doctors and have had every test imaginable. All tests come up perfect every time. No heart problems, no lung problems, no asthma, and no allergies that they can find. Every doctor is stumped and I have been told the same - that it's either caused by hyperventilating, or some have said I'm having an anxiety attack. I feel the same way about myself in that I am a very easy going, calm person and that it just can't be anxiety. And breathing into a bag didn't help. NOTHING helped! SO, I decided to take matters into my own hands and start messing with my diet, because I really feel this is a reaction to something. To make a long response a little shorter, I will cut out the trial and errors of the diet and just say that I quickly found out that caffeine was the culprit, in my case. I came across your article and wanted to share with you what I have found to be the answer. Try cutting out all caffeine and give it some time to see if it works. I found that once I stopped, it took a few weeks of drinking water and clearing out my system for it completely go away. Coffee is the worst! I can sometimes have a glass of iced tea or a soda without any ill effects, but if I get out of hand with it, I find myself getting the "breathing problem" again.

I truly hope this helps you! I know that it is soooo annoying and just awful to deal with.