Quote Originally Posted by Cycling Sister View Post
When I climb, I can't fill my lower lungs with enough air before my chest tightens up and burns.

I was out of breath for some hills, but I could BREATH! No more tightening and fear of being able to get enough oxygen.
Yeah, this is asthma.

The biggest trigger for me is riding up steep hills. But I do see variations in symptoms due to weather (cold air) and pollen. Last winter and spring I had problems 24x7 due to concrete dust in the air at work, while they were renovating the parking lot and garage. I'm still not fully recovered from it.