I'm 40 years old and prior to catching covid on Jan 1st I was in the best shape of my life. I ran 9 ultramarathons last year, including a 40 mile run on my birthday. I was double vaccinated and boosted on December 7th, all Moderna. I do 100 pushups and 100 squats a day and was regularly running 30 miles per week. (50km)
Covid took me out for 3 full weeks and my fitness wasn't enough to power through it. The first symptoms were extreme fatigue but what is hanging on is chest pain. I have had to significantly cut back my training.
Only in the last week do I feel like I can get back to a more normal pace and that's with a measured concern to not overdo it. I always feel great at the time, but afterwards I'm paying the price.
I plan to continue training at a reduced effort to try and bring back my fitness. I've never had something that holds on for so long before.