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Low heart rate 19.10

3054881
over 3 years ago

Updated Fenix 6 Pro Solar to 19.10 through Express. Did a soft restart and went for a run.

First I tried one of my custom running workouts, but it force quit the workout (returning to the watch face) when I hit the lap button to get from warmup to run. Tried several times before giving up.

I then did a hard reset (holding power until restart) and went for a regular run with GPS. Using my HRM-Pro strap I was surprised that my heart rate was constantly 30-40 BPM lower than before updating to 19.10. 

Any tips?

  • 0 over 3 years ago

    Have you tried with and without HRM to compare?

    Have you ensured there was no sweat while checking heart rate?

  • 0 over 3 years ago

    The watch just reports what the strap sends. And I VERY much doubt this has changed with the update to 19.10.

    If this followed an update to the STRAP firmware, then there might be grounds for suspicion. But there hasn't been. The cause of any change in heart rate lies elsewhere than the update.

  • 0 over 3 years ago

    You might be better off contacting support directly.

    Had weird readings from my former HRM-Pro (updated to 7.40 on 2021-08-04). Got it replaced with a new one a week ago, still with the former version installed. I also got a new F6X, because of heart rate issues.

    The only time my former F6X autodetected Max HR, LT and LT-pace was with a Polar OH1, and then it was way off (on all three). I know because I ran with a 735XT at the same time (connected to the same strap), that was spot on. On a previous run with both connected to HRM-Pro neither watch updated, despite crossing all three values.