The algorithm behind resting HR

I would like to figure it out how the watch decides my RHR as I see numbers in my 4hr watch graph than the RHR reported in GC. For example I got two times 49 but RHR in GC shows 52.

Also I see as I wake up in the morning already the watch decided my RHR for that day and as far as I see that numbers stay all day - should not be dynamically updated?

Maybe someone is able to clarify this better.

Thanks

0 Former Member over 8 years ago

Well and that is the issue, I do not know how the hell its calculated....
The Help in the Connect is not actual, its done differenty

0 Former Member over 8 years ago

Not sure how the watch modifies the RHR during the day. If I wear it during night, I get no update during the day.
If I do not wear it during night, it gets constant updates during the day to match the lowest HR.
Garmin, whyyyy? :-)

0 Ablator2 over 8 years ago

vivosmart 3 vs. Fenix 5

Returned my vivosmart 3 last week and got the Fenix 5 and I can tell you for a fact that the algorithms are different for the 2. On the Vivosmart 3, It always reported the lowest HR in a 24 hr period ( I wore it constantly 24 hrs/day) and would always update throughout the day if lower numbers were achieved.
The Fenix 5 on the other hand averages the sleep HR and reports it as resting heart rate. No more updates throughout the day even though my HR at times goes and stays lower than average reported.
Two new Garmin products with 2 different algorithms. Weird.
I do prefer the vivosmart 3 algorithm FYI.

0 Morrison66 over 8 years ago

Two new Garmin products with 2 different algorithms. Weird.
I do prefer the vivosmart 3 algorithm FYI.

Yes, because using sleeping HR to calculate RHR is WRONG by a medical point of view.

0 Former Member over 8 years ago

Not sure how the watch modifies the RHR during the day. If I wear it during night, I get no update during the day.
If I do not wear it during night, it gets constant updates during the day to match the lowest HR.
Garmin, whyyyy? :-)

Wow, this is interesting.

I have complained that my RHR is sitting at about 30 which is probably 10 low in my estimation.. On the rare occasion I wear it at night, I find my sleeping heart rate is right around 38. It looks pretty steady.

I also just noticed on the one day in the past week after I wore it to bed, my HR is sitting at 42 or so. So in the past week, I have a RHR of 30, 30, 30, 30, 42, 30, 31.

I'm going to wager that the algorithm must look at your sleeping heart rate to ascertain the RHR and might also use that to compensate for the low readings it gets during the day. Like it may figure that your sleeping HR is 40, so any reading I get below 40 is bunk.

0 meste7 over 8 years ago

I (we) may not find out from Garmin what is the logic behind RHR but after the latest 10 days I have to say I am impressed.

I was out of home working harder than usual, with late night meals and short sleep, which I usually do not do and my RHR for that period was higher. Came back home, the RHR is back to what used to be before.

So at least it works for me to this extent.