I had it twice. 1st round (last january around news years), had horrible breathing issues. Thought it was the flu, went to the gym and left after 10 mins because I couldn't breath. That scared the shit out of me and i'm only 33 years old. Took 2 weeks off of work and gym because I was diagnosed with pneumonia. Came back after the 2 weeks and still couldn't breath. Body aches were no joke and had chronic headaches which I've never had before. Anyways, took about 3 months off from the gym until I felt 100% again. The second go around of covid was thanksgiving week. Had body aches, lost my smell/taste, and was lethargic. This time I had bad brain fog during the day when I'm at work and have to think fast. I've only gymed twice since thanksgiving. I went back the other week and did legs and was beat up for days on end. Had to turn down the poundage and intensity. Still not 100% imo but this wasn't nearly as bad as the first go-round.