HRV sleep values vs HRM belt plus Elite HRV app

[Mauerwegler]

@mikekoski490 The HRV topic has come up again, especially comparing to the Elite HRV app. See https://forum.suunto.com/topic/10018/hrv-overnight-readings-thoughts/

[larrybbaker]

I see issues also between what the Vertical reports and what I get through Elite HRV and Apple Watch using SleepWatch app.

SV reports any where from low 20s to a high of 42-45 once or twice. 7 day average of 28.
Elite HRV and Sleepwatch app [AW series 8] are consistently in the 50s for HRV.

I believe I read soemthwere that Suunto only looks at the first 4 hours of sleep? Is that correct?
The SleepWatch app appears to monitor it over night.
Elite HRV uses the morning readiness a 2.5 minute test but random reading I have done over the course of a day always are similar - in the 50s.

Sensor/Suunto algorithm issues or?

[Swaddy61]

@larrybbaker As said above, this has been discussed in the other thread. The summary was that even the units for Elite and Suunto are different, so you are comparing apples with oranges!

I think it is more important to follow the trends - i.e. if you get a reading above or below your norm on Suunto, then you should be a little more cautious, rather than looking at, and comparing, an absolute value with a different measurement system from, e.g. Elite.

I also use Elite and Suunto. Usually, but not always, if I have an out of norm reading on one, then I will on the other - regardless of the actual absolute values.

[larrybbaker]

@Swaddy61 Thanks! kind of what I have been doing - just had not seen this discussion before.

[mikekoski490]

@larrybbaker Seems like there are quite a few ways to get an HRV score, so yes making sure you are watching trends over the raw number is the way to go. My Suunto and Elite HRV trends always match. Below are what I found on the web for all the difference ways to measure HRV:

Parameter Unit Description
SDNN ms Standard deviation of NN intervals
SDRR ms Standard deviation of RR intervals
SDANN ms Standard deviation of the average NN intervals for each 5 min segment of a 24 h HRV recording
SDNN index (SDNNI) ms Mean of the standard deviations of all the NN intervals for each 5 min segment of a 24 h HRV recording
pNN50 % Percentage of successive RR intervals that differ by more than 50 ms
HR Max − HR Min bpm Average difference between the highest and lowest heart rates during each respiratory cycle
RMSSD ms Root mean square of successive RR interval differences
HRV triangular index Integral of the density of the RR interval histogram divided by its height
TINN ms Baseline width of the RR interval histogram

[fabula670]

A note of mine about my actual experience with HRV:

• just after resetting the watch (due to calibration issues - there’s a topic by me, btw.) my HRV range has experienced some inconsistency, as the watch shows that the normal range is 26-30 while in the app has remained the previous one (23-27).

• after a bit more than a week, watch shows always the same but app shows 23-28.

[Oxhill_Runner]

Hi all. I have a Suunto 9PP and see a large difference between EliteHRV rMSSD readings and the 9PP values (also rMSSD).

My watch average is around 55-60 with a peak of 69msec but I did a reading this morning with EliteHRV using the Suunto HRM and it was 120msec, which is about right for previous readings too.

This is a huge difference, so my question is can both be compared directly ? @suunto maybe you can answer?

Thanks

[maszop]

@Oxhill_Runner These are completely different things being measured.
Another identical question, which has already been answered here.

[Oxhill_Runner]

@maszop
Can you explain why how completetly different metrics? Both are using units of mSec rMSSD …

[maszop]

@Oxhill_Runner Without going into more advanced stuff, if you read here and in other threads, you would notice that the measurements are taken in a different stage of sleep.

It’s strange that in the months since the last message you haven’t found time to read about it - you have all the information provided here.

[Oxhill_Runner]

@maszop

Hello maszop,

Thank you for taking the time to be patronising. Comments like that are the reason why I dont spend a lot of time on forums. But looking at your profile you seem to spend a lot of time commenting, fair play to you

There a saying I herd thats says ‘in an experts mind there are few options - in a beginners there are many’

… you are definitely an expert

Peace

[maszop]

@Oxhill_Runner I am far from an expert.
Let’s just respect the time of others. They also don’t have the time or desire to write the same thing several times.

Best regards