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Detected HR too low while running

I know what my HR usually is for a run, it should be 160+ in some sections, yet for most of the run it's much lower, not even reaching 140.

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6385795 10 months ago +1

Here is my cadence vs pace vs HR at the same time:

I do not know if it is related or not, but this started to happen in October.

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0 chocorello 10 months ago

The sudden HR changes make me think of improper fit of the watch or maybe lots of sweat beneath it.

0 Jacquers 10 months ago in reply to chocorello

It's fitted properly, as far as I can tell.

0 Lewis 10 months ago in reply to Jacquers

its important to reboot the watch once a week to improve performance, and wear it few cms over the wrist bone tight

0 RDW 10 months ago

Whats your cadence? Could be cadence lock.

Is the sensor clean, unscratched? Do you have a lot of hair, tattoos or similar on the wrist? Is it tight and high enough?

0 Jacquers 10 months ago in reply to RDW

I don't think it's any of those, but I do want to get a stretchy nylon strap to see if that could help. This is my 2nd 255 and the previous one was fine.

0 6385795 10 months ago

Same situation here.

Sensor clean and watch tight over the wrist.

0 RDW 10 months ago in reply to 6385795

Same question - whats your cadence for the same time?

0 Jacquers 10 months ago in reply to RDW

I don't think it's cadence lock.

0 8387456 10 months ago

Same problem. Drop from 150 to 135-140, next 10 km at this level, and at the end of 2 hours run, show 165-170. Its not first time, appears after software update in october ️

0 6385795 10 months ago

Here is my cadence vs pace vs HR at the same time:

I do not know if it is related or not, but this started to happen in October.