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RHR calculation

How does the 735xt 'calculate' this? I thought it was simply the lowest HR reading of the day, during 'waking hours'? But I've gone a lot lower (c. 6bpm) intraday than a 'typical' RHR reading..does it have to stay there for a certain time before it 'registers' as a RHR, to avoid erroneous readings/dropouts registering as a daily RHR? What's it really doing under the bonnet?
  • Is it me.....

    ....or are GC and GCM now 'synched' for RHR calculation? And if so, it looks like GC took on the GCM methodology, no?
  • I can't help but feel like they're smoothing these values (in GC and GCM) over a number of days, and not showing an estimated RHR value for that day. Anyone else get that sense?

    It's almost too well behaved now! :)
  • True....not seen 'todays' RHR for a while and did wonder about that. But the history is now a lot closer.. in fact, identical for me over all the time periods. At least it's more consistent, which is what we all want isn't it?
  • Hello everybody,

    I would just like to have the calculation rules of the RHR.

    Somebody have them ?

  • Thanks !

    Are that the rules of the "Heart Rate" widget of the 735xt ?

    Because it is written " It is recommended to drop the measured resting heart rate by 2-4 beats".

    I don't know where drop the number of heartbeats taken to compute RHR.

    .

    Extract

    " Resting heart rate is calculated as the average value (from 50 consecutive heartbeats) from the lowest found heart rate. For measurements that are conducted during the same time period (e.g. a year), it’s advisable to use the same resting heart rate. For example, if there are two measurements, and the lowest heart rate is found from the second measurement, it is recommended to create a new report from the first measurement using the new resting heart rate.

     

    Resting heart rate can be either the lowest measured value or a value that the specialist has re-defined. To get a reliable value, it is important that the measurement includes normally- or well-slept nights. 

     

    It is recommended to drop the measured resting heart rate by 2-4 beats if  ......."

    .

  • Are that the rules of the "Heart Rate" widget of the 735xt ?

    I'm not sure, but since Garmin uses FirstBeat algorithms for heart-related stuff, I'd speculate that this is more or less what the watch calculates.

    It is recommended to drop the measured resting heart rate by 2-4 beats"

    As I understand it, whenever you are in one of the specified conditions (ill, stressed, on drugs etc.) your actual resting heart rate is a bit lower than the one indicated by the watch. The watch won't take it into account by itself. You have to do the math yourself.

  • Thanks for explanations.

    I'am french and didn't understand the "2-4 beats".

    Now, I understand.

    .

    Thanks.