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Poor performance heart beat monitor Suunto 5

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  • N Offline
    NL-Paul
    last edited by 6 Oct 2020, 19:59

    Hi there, I bought a Suunto 5 with a build in heart monitor (with the latest update), a couple of weeks ago. This heartbeat monitor is very unreliable!. My previous watch was the Ambit 3 with a separate heartbeat monitor. When I compare both watches on the same MTB track I have an average heartbeat rate of approx 145 for the Ambit and 75 on the Suunto 5!?. I followed the advise from Suunto and tried serval other things (not too tight, higher up the wrist, the other arm etc) without succes. And occasionally it seems to work.
    Does any one have the same experience?

    E 1 Reply Last reply 7 Oct 2020, 04:01 Reply Quote 0
    • I Offline
      isazi Moderator
      last edited by 6 Oct 2020, 20:02

      Wrist optical HR on mountain bike is very hard to get right, and the sensor on the 5 is years old, so not sure you can get good results with it. Not what you want to hear probably.

      Watch: Suunto Vertical Ti

      Blog: isazi's home

      1 Reply Last reply Reply Quote 0
      • E Offline
        Egika Platinum Member @NL-Paul
        last edited by 7 Oct 2020, 04:01

        @NL-Paul wrist heart rate is a constant challenge.
        Especially during biking where you firmly grab the handle bar and get shaken all the time.
        Also skin color and probably hair has an influence.
        Best solution: get yourself an external chest strap HR sensor again which you can easily connect to your S5 👍

        t6, S6, Elementum Terra, Ambit 3 Sapphire, Spartan Ultra Copper, Traverse Alpha, S7 Graphite LE, S9B Ambassador, S9P Granite Blue Titanium, S9PP Titanium Sand, Vertical All Black, Race Titanium Charcoal,
        Race S All Black - TI Canary - Titanium Courtney

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        • S Offline
          Saketo Nemo Moderator
          last edited by 7 Oct 2020, 09:41

          Ovviously the ambit 3 heart belt is compatible with your suunto 5, so you can use that, if you still have it.

          As mentioned, handlebar vibrations are the worst to counteract, even worse than running in my experience.

          1 Reply Last reply Reply Quote 0
          • S Offline
            Stefan Kersting
            last edited by 7 Oct 2020, 09:45

            If you want exact HR measurement you have to use HR belt and not the wrist. There is up to 20% difference between wrist HR and belt HR

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            • N Offline
              NL-Paul
              last edited by 7 Oct 2020, 19:10

              Many thx. The reason I bought the 5 was the broken heart rate monitor on the Ambit. I’ll have to search for HR Belt. Thanks again.

              I 1 Reply Last reply 7 Oct 2020, 19:19 Reply Quote 0
              • I Offline
                isazi Moderator @NL-Paul
                last edited by 7 Oct 2020, 19:19

                @NL-Paul I use the optical HR of my S9for hiking and mountaineering, so I’m sure you can use the one on the S5 for many activities.

                Watch: Suunto Vertical Ti

                Blog: isazi's home

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                • Ł Offline
                  Łukasz Szmigiel
                  last edited by 7 Oct 2020, 19:56

                  I used to run with OHR and it was really ok for regular flat runs. The OHR struggled to get a good reading when going downhill fast when there were lots of erratic hand movement in difficult trail runs.

                  So I went with H10 and I’m happy. For regular runs I don’t see that much of a difference (well, maybe first 10 minutes are sometimes weird with OHR) but when doing trails HR belt is pretty awesome. The reaction time with HR belt is amazing compared to OHR.

                  However, for hiking and regular walks OHR in S5 works well. I very seldomly get weird readings for no more than fifteen seconds.

                  S9PP 2.40.44

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