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Heart rate about 20 bpm higher since new firmware

I've used the forerunner 255 for a while now and it has been showing almost exactly the same as my chest belt (polar h10).

But now, since the update its been showing between 10 and 20 bpm higher than historically (I've looked in the GC calendar). That is, both a higher value compared to what it used to show and equally higher than the chest belt. I wonder if it has something to do with the new firmware.

I noticed this first when I saw my max HR was very high in Garmin Connect

0 S.M.R. over 2 years ago

Strange , I had a similar thought when I used the OHR with 12:25 (not used with 12:23)

0 Former Member over 2 years ago

If the chest belt isn't being used does the watch give a normal heartrate?

0 S.M.R. over 2 years ago in reply to Former Member

No it seemed higher than I would have expected by 20 to 30 BPM during a very leisurely jog

0 2986359 over 2 years ago

I use the Garmin watch to track an exercise. At the same time I use another app and have paired the polar h10 to my phone (I usually measure with 2 devices). My pulse has never been as high with the forerunner since I started using it. The polar h10 seems to be more correct. Why? Because forerunner shows my pulse in the max pulse area where I know I'm not in.