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265 HR vertical Jump after about 10 minutes

gxgene1
13 days ago

I've had the 265 for less than a week and while I love the display and the esthetics of watch it may be going back.

I've done three gym activities, two treadmill shortish runs 3.25 and 4.5 miles and on both the HR at the start trends low in comparison to my Forerunner 245 and then somewhere in the general range around 10:00 minutes into the exercise takes a vertical leap into the area where I would consider it to be a historic norm as compared to the readings I get from my 245. On one of the days I did a long session on a stair climber after the tread mill run and it did not show the issue. Was it OK because it was changed to be a stair climbing activity instead of a treadmill run, or that it was the 2nd activity, I have no idea.

The frimware the watch came with is 19.18. I've hunted through the firmware change logs for releases since then and there is none that I find that mention this issue, though there seems to be a host of potential issues to introduce by doing the updates based on the forum.. 

I like the fluff that the 265 has vs the 245 but if it can't do HR right, that's a problem .

in the image below the red chart is the HR and the treadmill runs are the two outside images which look very similar and both show the vertical jump in HR.

The middle image is the stair climber done sequentially after the 1st treadmill run. The two dropouts in the stair climber were pauses to fuss with the equipment

  • 0 2 days ago in reply to Rohan Arora

    Well, the watch's sensors try really hard to detect something that could be interpreted as a pulse, so a tissue paper is not enough. Here's a link to an article that explains the phenomenon: https://www.wareable.com/fitness-trackers/why-heart-rate-monitor-work-on-toilet-rolls-6606

    As a personal observation, when I run during winter (=now) I wear my Forerunner 965 over my running jacket, which is over my merino running shirt. And when I'm standing still, the watch still keeps detecting my wrist HR through those layers (which definitely block >90 percent of the light) before I put on my HRM strap.

    The skin colour changes caused by heart beats are so faint that it's actually a surprise that optical wrist HR sensing is possible at all (all the other signals easily overpower the HR signal). Here's a an article on that matter: https://runningwritings.com/2021/05/cadence-lock-why-gps-watches-have-hard.html

  • 0 2 days ago in reply to Bitti
    Bitti said:
    the watch still keeps detecting my wrist HR

    More likely just guessing by showing random numbers.

  • 0 2 days ago in reply to Vizi

    Nope, it's my actual HR. I have tried having HR source dynamic switching on (which records both the optical HR and the strap HR in the fit file), and according to FitFileViewer the recorded optical HR and strap HR agreed almost completely for the duration of the whole run. (But for winter I turn dynamic switching off, because of course it would be stupid to actually rely on optical HR through several layers of clothing.)

  • 0 2 days ago in reply to Bitti
    Bitti said:
    because of course it would be stupid to actually rely on optical HR through several layers of clothing.)

    Why? You have just said that watch detects your actual HR through clothing.

  • 0 2 days ago in reply to Vizi

    Yes, I've said that I've noticed it somehow manages to do it. But I still trust my HR strap far more. During warmer conditions I keep dynamic switching on, when the watch is against my skin. It's all about levels of trust, I'm old enough to know that very few things are black or white.

  • 0 2 days ago in reply to Bitti

    That is exactly why I am pointing out to inconsistencies in your statements. It is very bold statement to say that watch measures actual HR through clothing. That might be very isolated case in some specific scenario but in most cases it will not be the case. Which is why you are wearing chest strap. 

  • 0 2 days ago

    You are experiencing HR issue that many people experienced and reported in 2024, for range of Garmin watches (with elevate 4 and elevate 5 OHR sensor). Garmin acknowledged the issue but seemingly did nothing to fix it. Recently they closed threads in which those HR issues were discussed.

    Garmin changed HR algorithm after which these issues started occuring more often, but also in some cases they replaced the watch for people who experienced this problem, so it might be also hardware related in some cases. They gave no statement whatsoever about cause of this issue and if they will ever fix it. 

    I suggest you contact Garmin and ask for fix or a new watch. They will not be able to fix it, but maybe new watch might be better. 

  • 0 2 days ago in reply to Vizi

    I'm not going to continue arguing with you (I don't want to argue at all). But I don't think it's "inconsistent" to say that the watch can in some conditions detect actual HR though clothing, and that's why it's not surprising that the watch thinks it's detecting HR when it seems light flickering through tissue paper.