How long does it take the heart rate sensor to detect heartbeat?

Discussion in 'Apple Watch' started by KOH, May 6, 2015.

  1. KOH macrumors member

    Joined:
    Apr 11, 2015
    #1
    It takes mines about a good 18-20 seconds to get my heart rate from glances.
    Seems a bit slow no?
     
  2. susan12369 macrumors 6502

    Joined:
    Apr 20, 2015
    #2
    When I go to see it in glances, it takes about 2 seconds before it starts saying "measuring..." and then it takes about 15 seconds before it's displayed. Since it is measuring beats per minute, I assume it needs some time to calculate the current HR.
     
  3. maricc macrumors regular

    Joined:
    Oct 13, 2011
    #3
    Yes agreed. Longer than I would have guessed.
     
  4. AtheistP3ace macrumors 6502a

    AtheistP3ace

    Joined:
    Sep 17, 2014
    Location:
    Philly
    #4
    Yes about 15 secs or so for me. I thought it would be faster.
     
  5. mrboba1, May 6, 2015
    Last edited: May 6, 2015

    mrboba1 macrumors regular

    Joined:
    Apr 24, 2015
    Location:
    Raleigh, NC
    #5
    How long does a CNA take to check your pulse?

    (I'll tell you - it's a minimum of 15 seconds, but usually 30, and they multiply by 2 (or 4))
     
  6. zlin9596 macrumors member

    Joined:
    Oct 24, 2010
    #6
    i feel like auto checking heart rate is kind of off to the normal open glance and check. how are your measurements?
     
  7. greytmom macrumors 68040

    greytmom

    Joined:
    Jun 23, 2010
    #7
    About 15 seconds sounds about right... you need at least that long to get a heart rate that makes sense.
     
  8. bjdraw macrumors 6502a

    Joined:
    Jan 24, 2008
    Location:
    Tampa FL
    #8
    When using the workout app, it samples the HR every 5 seconds. My Mio LINK optical wrist HR monitor samples every second. If I have my Mio Link paired with my Watch the HR glance updates instantly.
     
  9. andrewj macrumors regular

    Joined:
    Sep 4, 2008
    #9
    Agreed, it takes longer than it I would expect.
     
  10. tivoboy macrumors 68030

    Joined:
    May 15, 2005
    #10
    yes

    yeah, its between about 18-20 seconds, and I think it's probably trying to hit 20 seconds since that would be an easier BPM cal to do..HR recorded X 3..

    Probably gives a better reading than one that does it faster.
     
  11. maliu macrumors 6502a

    Joined:
    Jun 24, 2010
    #11
    As a nurse, I usually count for 15 seconds, but if it's irregular I go a full minute. It takes time. Relax.
     
  12. lchlch macrumors 6502a

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    Mar 12, 2015
  13. Lloydbm41 macrumors 68040

    Lloydbm41

    Joined:
    Oct 17, 2013
    Location:
    Central California
    #13
    I have just done 7 back to back samples of my Moto 360 heart rate via Google Fit and compared it to my very accurate Reebok chest strap HR monitor.

    All 7 samples averaged out to between 20 and 27 seconds. All 7 samples were within 1-2 beats of my chest strap monitor. While I do not have an Apple Watch to do this with, I would say that 15-20 seconds on the Apple Watch is actually slightly quicker than the competitors.
     

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