@Brandane I've never got it investigated, but all my life if I exert myself physically I get an attack of something like asthma.
I can't breathe, gasp for air, need to stop whatever exercise I'm doing, till I recover.
It doesn't take me long to recover, in fact I had an attack while on tour in the Lake District with
@Fubar and the CC posse, nobody noticed.
I was trying to catch up the big boys uphill
I didn't know I was so inclined, because I tend not to do extreme (for my capability) exercise.
I started to notice my limitations when we did the CC Ecosse rides.
I remember the first time it happened I was a primary school child, but my parents dismissed it because I was overweight, as in serves me right for being fat lol those were the old days.
Then it never happened again till many years later, when I started cycling with groups faster than me.
Are you worried because of your other condition?
Or because you want to be faster on the bike?
Do you have attacks even when you exercise within your limits?