I've never suffered any asthma, doing anything. At least until the Worlds in 2015 when I had a quite scary inability to breathe properly. I got measured and my lung function was ~70% of normal. Since I stopped smoking crack I've not had a recurrence.
I cut off the boring symptoms. I get a bit wheezy once a year if I run or cycle up a big hill in the snow. It's not as bad as full-blown asthma