For the last month or so, my heart rate has been consistently higher for the same intensity factor as it was until early April (and anyone in Britain can confirm there’s been not much increase in temperature!). I did Townsend (90 mins .63 IF) at 107bpm in March and 117bpm last week. I did a ride to Windsor at .69 IF back then and only averaged 107bpm, whereas at the weekend I did the same route at .63 IF and averaged 112.
I’ve also noticed that HR seems to be less aligned to RPE than it used to be. Today on a long Z2 ride I felt pretty comfortable but it kept going up to levels I’d associate with tempo.
(I also think my resting heart rate is higher but I don’t have any really reliable or regular measurements from before to make a firm comparison with.)
Any thoughts on possible causes? I’ve tried to google it but most of what I’m seeing is regarding either a dramatic rise in heart rate, or for people who do little exercise at all. I’m now double-jabbed, and if I did ever have Covid, it was the most symptomless bout of it anyone’s ever had. I had put it down to fatigue, but am still seeing the same results even after a good stint of rest and recovery.
Edit: Have changed the title of thread as the discussion below has me 99% convinced the vaccine is the cause of the issues.