A 32 years old guy in my cycling team caught COVID early on before vaccines were available, while he’s back cycling again he’s still not recovered to anywhere near his former fitness and has had to retire from racing.
He rides at least 4 days a week and has for a number of years recorded his ride data on STRAVA.
All his data, speed, power, heart rate and times over measured distances are shot through, he is a shadow of the athlete he was before COVID.