I have issues. One of them is
Cold Exacerbated COPD.
I can't do exercise in cold air without my lungs getting blocked up.
I spent an entire vacation in a hospital room in Las Vegas two Januaries back. When the ambulance arrived; my PO2 was in the low 80's. The sensation is flat out terrifying until they can get you on the O2. You can breathe all you want, you just can't get enough of it...
Sucked, big time...
Right now, it's too cold here to even go to the range, for me.
Sucks, big time...
Greg