Epix resting HR

Depends on how the RHR is calculated on Apple watch.

On garmin it's:

"Resting Heart Rate: This value is for the current day. Daily RHR is calculated using the lowest 30 minute average in a 24 hour period"

I'm using Oura as a second device and the calculation is different.

Oura does an average and the minimum during sleep so the values between Oura and Garmin are not matching and Oura tends to be a bit higher with the average.

Clear, thanks for the answer. The weird thing is that there should be an international standard to calculate RHR...

Wait until you hear about running power.

Its more about consistency - so going forward would ignore the apple watch RHR and just focus on the Garmin one. You are looking for changes in your trend, and the garmin RHR is pretty consistent and consistently reactive towards activity history, illness and injury. So its pretty easy to spot/deduce when your RHR decreases/increases as to what is generally driving this change.

Thanks for the answer. 

I have my doubts that the „30 minute average“ is correct. I know that Garmin writes this somewhere on their website, but on the German site e.g. they write that over the day they take a 1 minute average. Only when you wear it 24h it does some different calculation during sleep time (which they do not explain in detail).

To make it short: I don‘t wear my Epix over night and from my RHR values it is very obvious, that the watch calculates a 1 minute average.

For 24h it looks ok for me.

I can't calculate an exact average but considering that the minimum average per 2 minutes was 45 and my RHR is 49, i would say it makes sense as the values around 45 are a bit higher.

There used to be a more detailed support article on RHR (which I cannot find now - so it might have changed how they determine RHR) which used to go into more detail and split out how it determined if if you used it for sleep or if you didn't.

I suspect due to this article no longer being available that they may have adjusted their RHR calc. 

Only available link on it at the moment: https://support.garmin.com/en-US/?faq=F8YKCB4CJd5PG0DR9ICV3A

Only other bit about it is from this: https://www.garmin.com/en-GB/garmin-technology/health-science/heart-rate-monitoring/, where it mentions that if you use your watch for sleep the RHR is generally taken from the period just before you wake up: "Garmin wearables typically measure RHR while you are asleep, usually not long before you wake up. Consider sleeping with your watch for the most accurate measurements of your RHR."

jaamgans said:

Only available link on it at the moment: https://support.garmin.com/en-US/?faq=F8YKCB4CJd5PG0DR9ICV3A

And that's exactly how it works...at least in my experience.

It happened, rarely, that the sleep was pretty bad but in the office i was pretty relaxed, due to various reasons, and my RHR, from the morning, changed during the day.

I always use sleep tracking so have never seen my RHR change during the day - it remains per what it provided during sleep, which is understandable, as I wouldn't expect my RHR during the day to be lower than my sleep at any point. But if not using sleep, then yes I could understand how it could change during the day assuming that at some point a better reading where to be obtained as you were more relaxed/less active.

I would note that generally looking at my HR while at rest (not sleeping) it is generally higher than my sleeping HR, usually by 5-10bpm. Which is why I suspect that if sleep is incorrectly tracked while watching TV it always registers it as light sleep as the HR hasn't dropped enough for what it considers deep sleep. But considering how low my HR does get while sitting watching tv can understand why it can suspect its sleep especially if I am being very still (which is a habit from years of sitting on sides of yachts feet dangling over the edge waiting for that next burst of activity).