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Wrist-based heart rate reliability worse since new updates

anic17

Since one month ago or so, my Garmin Forerunner 965 has been tracking my heart rate deceptively bad, considering its price, both in running; have had cadence locks for 20 minutes, normal HR values and when pausing it goes back to cadence lock and surprisingly, for indoor cycling, where there's no arm movement at all.

This seems to happen more when I start the activity with a heart rate more elevated than usual, and then reports around 115-125 when the HR as checked by a chest strap is around 165-170.

I am aware that wrist-based heart rate is not the most accurate thing, but it is honestly too bad for the price I paid for it and considering that HR is the base metric for all other estimations and data (calories, VO2Max, training load, endurance score, RHR, HRV, stress, intensity minutes).

Any fixes, to recalibrate the sensor (apart from using a chest strap, which isn't always available)? Removing the watch and putting it again does not work.

  • 0 in reply to jkissane_

    Interesting. I'm not surprised the optical sensor is a bit late. But I am surprised that in the 1st hill it looks like it was faster than the Polar, and even more surprised that it went higher on the 3rd hill than the Polar.

    Though I have no experience with the Polar Verity Sense, but since it's also optical maybe 2 optical sensors are racing against each other here?

    Is there anyone who has both Polar Verity Sense and an electric chest strap? It would be nice to have such a comparison as well. One way to compare them would be like this:

    Connect the Verity to the watch in the System menu, (don't contact the chest strap there).
    Use my ANT+ HRM datafield: https://apps.garmin.com/apps/7c83d402-4b68-4f0a-b167-7139788a19b3 and contact that (during the activity) to the chest strap. This way we'll be able to compare the HR from both sources.

    In theory it might be also possible to do it the other way, as Polar Verity Sense should work just like any other ANT+ compatible HR sensor.