Earlier quoted context omitted.
That's depending on what you consider a "performance enhancing substance". With basic food and drinks, we surely all agree that that's not the case. But the line starts to get blurry with supplements. Whey? Creatine? Caffeine? Supplement stores are full of this stuff, and a lot is really just a waste of money and exists to milk the amateur gym bro cash cow. But some of those things help. And eventually you cross the…
Well, the line still seems blurry regarding medicines that athletes are allowed to take if they have a specific conditions... For instance, a lot of pro cyclists seem to suffer from asthma (40% vs 8% in the general population)!
“Exercise-induced asthma is the most common medical problem among winter Olympic athletes, especially among cross-country skiers. Nearly 50% of these athletes suffer from the condition, closely followed by short-track speed skaters at 43%. For figure skaters it’s 21%, Nordic combined it’s 17%, and for ice hockey it’s 15%. By comparison, around 9% of the UK general population suffers from asthma.”