Heart Rate losing lock during activity?

Discussion in 'Apple Watch' started by BrianNH, Apr 24, 2015.

  1. BrianNH macrumors member

    Joined:
    Apr 20, 2015
    #1
    I went for a run with my 42 SS ML today and at first the HR seemed responsive and about where I would expect it. After about 5 minutes, the hr colors turned grey, the heart stopped beating and the numbers stopped changing. It remained this way for a while and then several minutes later it showed another really low locked reading. Eventually it sorta worked again. I tried adjusting the watch on my wrist, even tightening it more than it already was and nothing. This seems more like a software glitch imo. Anyone else see this?
     
  2. NAYo2002 macrumors 6502

    Joined:
    Apr 16, 2011
    #2
    I think it's intentially only samples HR randomly to save battery life.
     
  3. BrianNH thread starter macrumors member

    Joined:
    Apr 20, 2015
    #3
    It samples every 10 minutes normally, but I was pretty sure when using the workout app, it samples continuously using the green lights (I could see they were on the whole time)
     
  4. noah82 macrumors 6502a

    noah82

    Joined:
    Oct 16, 2008
    Location:
    San Diego, CA
    #4
    Just did a 1 hour boot camp workout which i normally burn 850+ calories in an hour and the Apple watch said that I only burnt 499. Almost every time I looked the watch couldn't find my heart rate.

    I was wearing it two fingers above the wrist bone and it still kept losing heart rate. Very disappointed so far.
     
  5. NAYo2002 macrumors 6502

    Joined:
    Apr 16, 2011
    #5
    How do you know the 850+ Is correct?
     
  6. noah82 macrumors 6502a

    noah82

    Joined:
    Oct 16, 2008
    Location:
    San Diego, CA
    #6
    I had previously used a Mio Alpha and Fitbit Surge before getting the Apple watch and both were consistent.
     
  7. Marshall73 macrumors 6502a

    Marshall73

    Joined:
    Apr 20, 2015
    #7
    I had the same when using my rowing machine. I tightened the strap 1 notch and after that it was ok for the rest of the workout.
     

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