Hi @phinbar21, I'm sorry you've been experiencing this breathing issue. But I'm glad you found this forum and as you can see, there are many people who are experiencing the same symptoms. So you're definitely not alone! I know what you mean about feeling like your lungs are empty and can't fill them. We've termed that "air hunger" vs the SOB which would be more like labored or heavy breathing due to certain conditions like asthma, COPD, or just exercising.

Have you thought about cutting back or cutting down the frequency of running? When this all began for me, I would still run and it would seems to help but I've since only been running (which is really a light jog) just as much as my breathing can handle without pushing too hard.