Apple Watch Series 2 cannot detect heart rate during workout

Discussion in 'Apple Watch' started by MatthewWallis, Apr 17, 2017.

  1. MatthewWallis macrumors member

    MatthewWallis

    Joined:
    Sep 20, 2016
    #1
    Got my Series 2 on launch and seem to be having an issue where it struggles to detect heart rate during exercise. I'll need to wipe the sensor and my arm before exercise for it to work properly at the start. Sometimes i'll need to take it off during and give it a wipe as well. My heart rate will go up to around 150bpm and then the next minute the watch will tell me its 70bpm and wont correct itself until I wipe the sensor which will affect the amount of calories it thinks i've burnt during the workout. Is this a fault or do other peoples do this too? Obviously it's the sweat that is affecting its ability to work but should this happen seems like it defies the point a little bit?
     
  2. Julien macrumors G4

    Julien

    Joined:
    Jun 30, 2007
    Location:
    Atlanta
  3. Newtons Apple macrumors Core

    Newtons Apple

    Joined:
    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #3
    Afraid it is common. Never found mine to be dependable, sweat or not.
     
  4. daflake macrumors 6502a

    Joined:
    Apr 8, 2008
    #4
    I have never found the wrist method of heart rate monitoring to be consistent. I always use a heart rate strap (chest) to take that measurement. Wrist is a novel idea, but it requires the strap to be tight and as you have found, sweat can interfere.

    Had a Mio and it was much the same.
     
  5. BarracksSi Suspended

    BarracksSi

    Joined:
    Jul 14, 2015
    #5
    There's a sports/workout strap that has a clip for holding the AW, and the strap wraps around your upper arm instead of your wrist. I forget the manufacturer's name, but word from other MacRumors members say it works really well for tracking HR.

    (yet another benefit of being able to disconnect the AW's straps so easily)
     
  6. mk313 macrumors 6502a

    Joined:
    Feb 6, 2012
    #6
    I don't have any personal experience with it, but the strap is made by twelve south
     
  7. tl01 macrumors 68020

    Joined:
    Jun 20, 2010
    #7
    Mine does this from time to time but then it will pick up again. I have a strap and could wear it for each work out but am happy to not have to. The strap isn't particularly comfy. I don't need it to give me a precise pulse at every moment so it is acceptable to me. If you want better accuracy then grab a strap.
     
  8. Steve686 macrumors 68040

    Steve686

    Joined:
    Nov 13, 2007
    Location:
    US>FL>Miami/Dade>Sunny Isles Beach>Condo
    #8
    I've found you need to keep your arm still while the watch is reading. Takes like 5-10 seconds this way, otherwise, it seems any motion inhibits a solid read.
     
  9. MatthewWallis thread starter macrumors member

    MatthewWallis

    Joined:
    Sep 20, 2016
    #9
    Thanks all for your replies! On a side note, I do a lot of exercise on a cross trainer which workout is best to select when doing this?
     
  10. Julien macrumors G4

    Julien

    Joined:
    Jun 30, 2007
    Location:
    Atlanta
    #10
    It is a type of elliptical so use Elliptical.
     
  11. Ixidor macrumors regular

    Joined:
    Mar 22, 2016
    #11
    In my experience, I have less issues if I wear the watch a little looser (but not to the extent that it flops around).

    If I wear it to tight, the watch struggles to read my pulse consistently.
     
  12. mk313 macrumors 6502a

    Joined:
    Feb 6, 2012
    #12
    I have no affiliation with Twelve South, except that I've bought a couple of items from them, but this strap is called the Action Sleeve and I just got a coupon code from the for $5 off the Action Sleeve that is good through April 23, 2017. The code is ActionSleeve5 if anyone is interested
     
  13. maka344 macrumors 65816

    maka344

    Joined:
    Nov 4, 2009
    Location:
    London, UK
    #13
    Out of interest, what are the Hr numbers that make you think the readings are out? High or low?
     
  14. Shaul macrumors newbie

    Joined:
    May 3, 2003
    #14
    I agree that sweat is probably the major cause of problems with HR reading. Last month we had a race at noon (!) so I had to put on sunscreen. This was the first run I had with no HR misreading issues. I later realized that the reason was probably the sunscreen lotion blocking my sweat.
     
  15. Technarchy macrumors 604

    Technarchy

    Joined:
    May 21, 2012
    #15
    Sweat, movement, hydration levels and shape of the wrist all play a role in how consistent Apple Watch will be in capturing heart rates.
     
  16. beartjie macrumors newbie

    Joined:
    Apr 26, 2017
    Location:
    Pretoria, South Africa
    #16
    I use a BT heart strap for HR data on the bicycle and the spinning bikes. I tried running with an HR strap, but that did not work 100% as it irritated me after a short distance.
     

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