@MDM62 have you verified that 190-200 is actually real? Sounds very inflated and could be a watch error. Don't be bothered about your max HR, the formula 220-AGE is old and debunked. Good however that you went to see GP.
I must say that I had a similar worry as I had an impression as if my HR got higher during my runs (not spikes but higher overall, for the same performance my HR seemed to be shooting much higher) after I had covid (mid-December). But like you, I was feeling ok so decided to ignore it and continue running. Now, having more data and looking back at a couple of weeks (pre-covid, covid, and post-covid) it looks like it's all just in my head. My max HR went up to 190 (from 188, and according to the formula it should be 180) but looking at trends of max HR, average HR, and resting HR it's all as stable as usual. In my case, it was probably just post-covid fear of complications. I also heard how covid may affect the heart so I guess it got me worried.
Do all the tests and see whether you have anything to worry about. Covid is still a very new thing for scientists and there is a lot we don't know about it so it's better safe than sorry. Like @SunsetRunner I'm also very curious about development of this topic.
