Assuming my doc is right and I had Covid, I've been feeling progressively better every day for like a week and a half, and then hopped on my trainer today and was out of breath doing stuff I can normally do nose breathing. Both unable to take a full breath AND feeling like I couldn't get enough air. I'm fine now that I'm not riding, it's just very, very weird. This thing seems to linger, and that is something y'all should be aware of if you catch it.