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Garmin 965 Heart Rate inaccuracy

christhomas1966

I thought I’d start a new thread as Garmin seems to be closing them on this topic.
On the treadmill today at a constant steady pace. Garmin was showing 120 bpm after 20mins. I checked this with the Matrix treadmill hr which showed 152. Big discrepancy. See pic.
After  another five minutes my Garmin hr dropped to 105 which I thought unusual then jumped up to 152 in line with the treadmills output. 
This makes me question all the runs I have done with the watch so far.

With most of my long easy runs my hr on Garmin drops after 15km

Now after shelling out £500 for the watch I’m going to have to buy a hr strap for another £100. 
the reason I bought the 965 was to have a fairly accurate hrm measurement.

  • 0 in reply to christhomas1966

    I've had the Wahoo, Scosche's and they're both pretty good.  the OHR straps don't respond as quickly as a chest strap.  only makes a difference when I'm doing short intervals. So- those days I put on the garmin chest strap.  cool that the OH1 has that goggle strap holder, a good reason to choose that one.  Love my FORM swim goggles.  got the new ones with HR built in.  Such a fun swim toy, along with the aftershokz swimming headphones.  

  • 0 in reply to morey000

    Ive been using the first version of the form goggles as I got them secondhand. REally good for keeping track of laps and speeds.  I have also signed up to swimsmooths swimguru  app on Garmin which gives stroke analysis feedback - its a really useful tool. 

  • 0 in reply to christhomas1966

    my garmin almost always misses a lap or two of my workout.  my FormSwim- always nails it.

  • 0 in reply to christhomas1966

    My FR 965 records my swim workouts, (and I am a fairly good swimmer) freestyle, and backstroke (!)  laps ~ most of them 20% or so as BREASTSTROKE (!!!) Why ???

     I have also signed up to swimsmooth/swimguru. its very good

    Regards

  • 0

    Honestly, this is not something new. Happens to me as well on the treadmill, 3 out of 4 times I would say. Way too low display of HR and then after like 20-30 mins it jumps up to the actual value, which is then obviously way too high if I try to run zone 2. 

    This issue is known and been persistent since software updates in quarter 2 2024!! The fist year I had the watch, with older software, the HR was ALWAYS super spot on, so good that I sold my chest strap. They have not fixed this issue in almost a year now.

    My next watch won't be a Garmin.

  • 0 in reply to manueleltoro

    Many thanks for your reply. Thats really interesting thats for the info.  

  • 0

    I am a bit surprised and disappointed with that as well, coming from a pixel watch 3 it seems like the HR sensor Google is using is much more accurate than the one being used by Garmin. Not sure on the outdoors but indoor while doing strength training or running on the treadmill I think it takes the forerunner a good 10-15 min to catchup with your HR

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