The algorithm behind resting HR

I am very similar with respect to sleep including frequent international travel and I find my RHR in GC is reasonably stable even with this issue, varying typically 3-4 BPM from day to day over a week, unless I am ill or over train significantly and then I see much higher variance.

Interesting that you see a difference simply changing the sleep time, do you mean you just manually change it in GC after the night has passed and the RHR is updated with significantly different values, or do you mean you are manually changing the sleep time window in advance every day prior to sleeping and seeing this difference?

That's right, I try to change the time in the app before going to sleep, and that is the way to get stable readings. But If I forget to do it and I go to bed later or I wake up sooner the RHR usually (but not always) goes up to 10-15 BPM. That should mean that the watch doesn't detect that you're awake and active?

I don't know, I can't figure it out. Regarding that I was happier the I had a Fitbit Charge.

The watch itself does not detects if you sleep or are awake. This is an algorithm in the Connect.
This is the functionality that was introduced when I had Fenix 2 or 3 (not sure about time)
Before that, you had to tell the watch - Sleep, to indicate when you went to bed and with the Alarm in the morning you had to stop it.

I am really confused about the way the RHR is calculated.
In the Connec, in the HELP article to your Heart rate it states:
Your Grmin device analyzes your lowest observed heart rates for a given day to determine your resting hearth rate. For more accurate reading, you should be wear your device regularly....

Garmin, please can you clarify how its really calculated?
THANK YOU

The watch itself does not detects if you sleep or are awake. This is an algorithm in the Connect.
This is the functionality that was introduced when I had Fenix 2 or 3 (not sure about time)
Before that, you had to tell the watch - Sleep, to indicate when you went to bed and with the Alarm in the morning you had to stop it.

I am really confused about the way the RHR is calculated.
In the Connec, in the HELP article to your Heart rate it states:
Your Grmin device analyzes your lowest observed heart rates for a given day to determine your resting hearth rate. For more accurate reading, you should be wear your device regularly....

Garmin, please can you clarify how its really calculated?
THANK YOU

And it is not that! I get numbers as low as 48 during my sleep for many minutes, and resting HR for that day is reported by Garmin in the area of 55!

COLLINS sale

And it is not that! I get numbers as low as 48 during my sleep for many minutes, and resting HR for that day is reported by Garmin in the area of 55!

I agree, its not like they state in the Connect, I get RHR as 65, but during sleep I get low as 50 for hours. During day, I get to 45-50 for several hours, so not sure how the 65 gets into the picture...
Therefore I would like to understand how they calculate it.

So I did a test, reseting my watch to factory during the day, so it was like new without any history.

For that particular day, where I had no night before sleep, I got RHR 48, which was the lowest HR during the day.
For the next day, where I had the watch on wrist during the night, I got 65... which was not the lowest during the night...

Next night I woke up at 4:00 AM (so before my normal wake up time which I have setup in connect) and just checked the RHR and on the watch I already had a mark for the day, so synced with phone and got 63.

Where are these numbers comming? I would really like to understand the algoritm behind

Something similar...

After I updated to beta, the RHR graph went to no data so for the rest of that day I got RHR recorded as 48 (the minimum for that half day). The following day, also I got numbers of 50s for long time, the RHR is 56. So, yes some explanation would be great from Garmin ...

Is someone from GARMIN reading some of the forums? I mean it would give a lot of feedback to their products right?

Would it be for Garmin really a problem to communicate more with customers?
The support on customer service is just crap, they know sh!t about the products...
I am really flustrated, sorry...

This is all very interesting. I am getting a VivosmartHR tonight so I can see what you are all talking about. It uses the same sensors and garmin connect as the other garmin optical heart rate devices. I will have to look into the data I get from there and see what my RHR is compared to the RHR I get when using the chest strap.

What is the % accuracy on the Optical vs chest strap according to garmin? Does anyone have a link to that?

I have to get back to this thread as is iritating again and again.
So few examples from last weeks of usage RHR:
1. I went to bed after party at 02:00, before that I checked my watch and the RHR for that day was there.... 72 beats, and stayed like that the whole day without any change
2. I leave my watch on hand while sleeping, and I get values from 61-65 as RHR daily - even I see f.e. in the Health application on iPhone that my HR droped during night to 45 regularly
3. I left my watch for few days on the table and not on wrist during sleep - the RHR was updated during the day several times and coresponded to the lowest HR during the day - values 45-50 for several days

Now how this behavior can be understood? It has no sense of consistency. Can understand why a watch for 500+ EUR can have such software....

I don't know how it's calculated, but I will say that it doesn't automatically set the RHR for the day based on the first few hours of the day.

Today, I looked at the graph and my RHR was about 35 ish. Right now, the watch has modified it (2-3 hours later) and my value for today is 31.

I'll mention I don't generally wear my watch at night. But when I put it on it grabbed a value as soon as it could, and a few hours later it had modified it down.