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  • To be fair I get some wacky readings on my chest hr too, they're by no means perfect. I do have an irregular heartbeat though.

  • Yeah, I guess I just want a second set of data for comparison.
    I did a decent effort 5km the other day - I was definitely going near my limit, but my HR average was 132, with a max of 150. Even on steady runs my HR sits around 165, never mind when I'm trying to go fast. Same goes for when I've been doing kettlebell workouts - checking my pulse has it over 160, but the watch will be reading 70-90.
    It seems to work totally fine 95% of the time, but really vigorous activity seems to throw it off.

  • Yeah, I guess I just want a second set of data for comparison.

    I've considered carrying my garmin cycle computer with me for just that reason - optical with watch and chest with cycle computer. Strava used to be an option for a comparison but they removed sensor support I think.

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