Long before covid, lots bodybuilders have been dying of heart attacks, here’s a list of 21 famous ones who did
https://fitnessvolt.com/bodybuilder-deaths-heart-attack/
You can do that for many sports where folks are pro and competitive at that level, especially if you open it up to other health problems such as concussions, knee and hip problems, etc.
***There’s a line you cross where you’re no longer doing it for fun or health.***
It becomes the source of income, or it’s feeding ones pride, and folks push themselves to a point where it’s actually detrimental to ones health.
https://cyclingmagazine.ca/sections/news/a-history-of-professional-cyclists-who-died-from-heart-attacks/ (they like to use medication which causes one to have more red blood cells but which has some serious side effects: Epoetin alfa).
https://www.drugs.com/article/blood-doping-armstrong-pro-cycling.html