I read the article in the original post, and I think that you are talking about Tamsin (in the UK). I also read her's via twitter or something. I'd read that she got back to exercise/training a bit too quick.
I suspect I had a seasonal flu around March 6ish. Timing is suspect with everything going on, and Amy caught something at a kid's swim meet a week or two before I got sick. I can't remember the last time I stayed home from work for anything. Anyway, I knew that I was sick. Because of the timing, no idea what it was because in early-March they were still saying there's no COVID test unless you've been around someone or have traveled. And, they were saying to monitor symptoms. I had a sore throat one day, really bad fever one night, and a low grade fever off and on for 3-4 days after, and then sinus issues for a total of about 3-4 weeks.
Just as a data point, I've been tracking heart rate variability. I still coach a few athletes, and while only 1-2 of them track it, I've been doing it for over a year. Other than overall trends/averages I haven't seen a bit difference. When I'm run down the trend is lower, when I"m not, it's slightly higher.
My HRV went from about an average of mid-70s pre-sick to probably low-30s for 2 full weeks during/post-sick. I have not run the actual numbers. My resting HR has never been that low (upper 40s to mid 50s), but it went up to the mid-60s for a full week and very slow recovery back to the mid-50s. I didn't track any of this when I was racing pro...even RHR.
I only took a couple of mucinex pills, nothing else. I did some very very light exercise when my HRV returned to the upper-30s or low-40s after about 2 weeks. I'd had no fever for 10 days and my sinus issues were mostly gone. I figured at that point, it was lower because of being un-fit and recovery from being sick. My RHR has slowly trended down to the mid-50s. My HRV is back up to the mid-60s on average.I exercise now about 4-5 hours a week to give y'all an idea of what I do...used to race pro and train 20+ hours a week.
Point being, you're going to know if you are sick. If you are tracking HRV and RHR they can provide some info for recovery status and when to get back into some exercise/training. I don't know that HRV is the breakthrough that some have claimed it is, but I think that trends can be good. I also think that it kind of helped me take a conservative approach to getting back to exercise. I will still take the day off (even when feeling 100%) if my HRV value is somewhere aroudn 25% below normal just to be conservative. I'm looking at the rMSSD values on the HRV4 app, not the recovery points.
Be safe out there. It's an even longer season, if there even is one. Try to save your immune system for when you need it.
Brandon Marsh - Website | @BrandonMarshTX | RokaSports | 1stEndurance | ATC Bikeshop |