Hi @tonyagregg — so happy I found your post. Back in January, I started to experience shortness of breath in the exact manner you're describing. Not all the time, but most days there's generally this feeling that I'm not breathing enough, and every few breaths I'm taking a big deep breath, where I'm not getting the last 5-10% of it. I'm yawning a lot too, even on days when I feel rested. I've seen my primary care physician, a cardiologist, and had a lot of other tests done to ensure it's not heart and/or lung related. I first started to experience symptoms when doing the squat exercise, and I'm inclined to think that it's some kind of myofascial pain syndrome (search "pain science trigger point" in Google) and have booked an appointment with an acupuncturist to see if that helps. It's weird though — I stopped exercising for about a month, but the breathing was still an issue. I tried a deep tissue massage, but that only aggravated my shortness of breath unfortunately. I'm also very healthy — I get into the sauna almost every day, do yoga regularly, and running / lifting as well. It's not life-changing at this point, but it's quite annoying and I'd love to get it figured out. Wishing you and the others who have chimed in this thread the best of luck. Will keep you all updated if I figure things out over here. Thanks for posting!