Plenty of athletics have underlying health conditions, for example, I've seen many professional footballers use inhalers during a game, many have poor eye sight and wear glasses (obviously contacts during games). Not sure who we were playing, but I even remember Gary McAllister losing a contact during a game while playing for us and having a replacement inserted while the game went on, it was only this summer we seen Eriksen collapsing and needing CPR on the pitch, being super fit and having huge amounts of talent doesn't make them immune to healthy issues.