I'm 52 years old.
My fitness level has dropped a lot in the last couple years, but nevertheless, I did my first Zwift race a couple weeks ago.
Over 44 minutes, my average HR was 167bpm and max was 175bpm. I gave it all I had!!
In about 200 metres, my heart rate dropped from 170 to 136, and when I got off the bicycle, it was below 100 bpm several minutes later.
If my HR stayed high for hours, I would certainly be worried!!
