Anyone STILL having heart rate accuracy issues with their Fenix 6?

Hi all,

Super frustrated, but I am still having issues with my Fenix 6S and heart rate accuracy even with the 4.20 software update. I'm wondering if it's just me or what the deal is? I had a 5S Plus before this and had no issues doing the same activities so I really don't think it's user error. My heart rate hardly reads over 110 during really vigorous exercise when my heart rate is closer to 160+. I have tried wearing on the inside of my wrist, tried my other wrist with no luck. It consistently reads 80-110 bpm the whole time. I wouldn't have bothered to upgrade if I knew this was going to be an issue. I know that wearing a chest strap is the most accurate, but I don't like to have to wear it for all of my work outs and my old Fenix was totally fine as well as my apple watch before that. Any suggestions? 

  • Its actually much better and on my end I can say its fixed for running atleast.

    Did theses tests during 30 min runs (slow , medium runs)

    F6x whr only vs:

    H7 : h7 starts high at first ...than after 1 min they are 2 ..3 beats difference...it was cold that morning like minus 3 celsius

    Hrm tri : pretty much same 

    Rythm+ : same like exactly 

    Morpheus band : morpheus is abit higher but nothing crazy.

    I have too many devices....Grinning

    So its fixed for moi!

  • Try doing the same test immediately after you finish the activity and hit save. The HR values produced by the Garmin when not in an activity are so out of touch with reality it's not even funny.

  • After update to 9.0 a still have HR problems. It is slightly better in the moments and slightly different but still big problems. Today i have done some work with chainsaw and HR was outstanding, as should be. But then i test HR within activity and disappointment again and then i test without activity (cpuch and stairs and some push ups)and again big disappointment too. I dont know what is the problem with this HR anymore, and i am really tired with all of this.

  • Yes, the same for me super frustrated!!!

  • I just got my Garmin Fenix 6s and heart rate with the latest software is just ridiculous. I used to use Polar's product and Garmin forerunner and this is the worst. Real heart rate is about 160 and garmin Fenix 6S is showing exactly the same numbers from 80 - 110. I think that garmin should recall every product and return the money, this is just useless product or is a ok watch, but I didn't buy just a watch

  • I gave up. This watch just doesn't work well with the exercises I do most: Running, Hiking, Stair stepper and weightlifting/HIIT. I had an old Garmin VA3 that worked better (old sensor) than the Fenix 6 Pro (new sensor) that I have. I can tell you from my experience that there are old Garmin devices and new devices from other companies that are able to produce reliable and reproducible WHR with all activities that I mentioned. The excuse I wear it wrong or that it is "normal" for all watches with WHR that I see a heartrate of 160-180 with WHR when doing weightlifting or recreational running is non-sense. My old VA3 didn't do it and my new watch from another company doesn't do it either they show HR of 100-120 for weightlifting and 130-150 for running as it should be. That means at the moment the F6 cannot measure the WHR reliable because of the new sensor. The off HR has major consequences on the health readings: If I have constantly have a HR of 170 while weightlifting or running it calculates the burned calories 200-300 higher than normal. It screws up my calorie intake, messes probably with recovery/training intensity because it calculates anaerobic and high aerobic training wrong.

  • Same here. Come from rock solid f5 plus and now have a worthless f6x solar with wrong metrics caused due to much to high wrist hr readings. Today while working with the computer I had the wahoo tickr with wahoo app and the f6x with wrist hr. F6x shows around 65 bpm while wahoo was constant at around 43 to 48 bpm. This was controlled with timer and beat counting with hand . F6 is constant too high around 15 beats, wahoo is quite good. When I switch pulseox off it becomes a little better but is always 5 beats too high.  Due to this all hr related values are to high  and crap

  • I m wondering that there is no wrong wrist hr thread in the marq forum. I thought it is the same hardware Plattform than the Fenix 6. Is there no wrist hr problem in normal situations like rest, work, watch tv ....

  • It is interesting to hear people had much better readings with the old sensor and models. I came from an AW2 that worked WAY better as an OHRM. Of course, it isn't perfect, but it was pretty close! The ORHM on the F6 seems more like a random number generator than anything else. I am starting to wonder if the new sensor has more a flawed design than it being a software issue?