After going to the doctor several times for a cough that I’ve had for a little over the past year, I took a breath test. My doctor informed me that I have about half the lung capacity of a health person my age/height/weight/race ought to. That explain why I’ve always gotten winded easier than I suspected I ought to. The cool thing is that I’ve dealing just fine with this for my whole life. Hopefully, with treatment, I’ll have a much greater constitution.