Sign me up I want to know why I am! I have now had covid twice. I'm not a Covid denier, but I'm a realist and understand the world keeps on going. Luckily my 1 tired day happened on a weekend but I still did not miss a day of work. I probably could have worked through mine to some extent. I worked from home the week after as luckily for me they changed the quarantine rules in January. Plus I am highly likely to have heart disease myself due to my lineage both grandfathers and father passed from heart attacks.
That said I need to lose some weight and do better exercise as I'm not getting any younger. Kudos that you've kept yourself in shape and good luck beating heart disease for as long as you can.
Sent from my Pixel 3a XL on a bullet train from Hillsboro.