I have heard reports that 80% of the pro peleton have either asthma or EIB.
That might be an exaggeration, but undoubtedly it’s far higher than usual, and not just cyclists, but swimmers and athletes (such as Pauls Radcliffe)
link
Not only do many only get symptoms when they exercise, but there is a theory that the training is actually causing the problem. And this seems to be the case with me, having developed EIA at the ripe old age of 48, which may have something to do with me doing a lot more cycling and running (especially in cold weather) over the last 4 years. My peak flow scores are shockingly low for someone of my size – little better than my wife who has been asthmatic all her life.
I’ve certainly noticed an improvement when I use Salbutomol, which apparently will have no effect if you don’t have asthma. I only take one or 2 puffs, not the 16 which I believe is the WADA limit !
Nonetheless, I suppose it is technically a PED !