Suunto SHRB2 Firmware 3.2.6.8 Update

[atoponce]

@matram Except when there is bad R-R data, there is bad HR bpm data. Due to the R-R noise, I have bpm drops. Here’s my HR bpm data from the same run where I shared the previous R-R intervals. Whenever I have R-R noise, I have bpm drops.

[Speed Man]

@Dimitrios-Kanellopoulos I can’t find the option to display the R-R graph. Could you please tell me where I can find it?

[Dimitrios Kanellopoulos]

@Speed-Man it should be tehre if the activity has RR do you have a link for me so I can help and check ?

[Maryn]

What amount of artifacts (%) is the limit for a good measurement?

[Dimitrios Kanellopoulos]

@Maryn there will awlays be artifacts with belts. And not all libs do the same parsing.

So you need to establish the baseline in a way

[Speed Man]

@Dimitrios-Kanellopoulos https://quantified-self.io/user/Wn5k7NdDxrWRF578c9IxeLgywVB2/event/9396ac60cdc1f02c7999c0c580e248acdd389ad3eccd4950ff68664e32a77154

[matram]

@Maryn said in Suunto SHRB2 Firmware 3.2.6.8 Update:

What amount of artifacts (%) is the limit for a good measurement?

When I asked AI - the response was 3-5% for a DFA-a1 or HRV computation.

Maybe the time has come for an official response from Suunto?

[Dimitrios Kanellopoulos]

@Speed-Man check under RR and HRV both on the summaries and just above the charts Screenshot 2026-10-30 at 10.56.48 Screenshot 2026-10-30 at 10.56.43

[Maryn]

@Dimitrios-Kanellopoulos Yes, there will always be artifacts. My question is more about what percentage can be considered a good measurement, acceptable, for example, in terms of Zone Sense.
I used to have a lot of artifacts, and that was the reason I had to replace just the strap on my Suunto sensor. Since then, I’ve been getting results in the 0-1% range.

[Speed Man]

@Dimitrios-Kanellopoulos Can I view the data in a graph? I’ve been trying to find that option, but I can’t seem to locate it.

[Dimitrios Kanellopoulos]

@Speed-Man jsut press the hrv-rr button bro see my pic. The show charts button

[Speed Man]

@Dimitrios-Kanellopoulos I got it working now. Thank you very much!

[stromdiddily]

today’s run - stead 90 minutes, rainy weather, ON synthetic top

[snow*]

@isazi said:

Forwarded this discussion to the product manager at Suunto

Just checking in: has there been any progress since this was forwarded to Suunto’s PM? Thanks!

[VoiGAS]

Today wet belt and (different) merino - and a lot of noise

[isazi]

@snow I am not testing the HRM2, I only shared a link to this post, but have no way to check the testing firmware and if anything improved

[atoponce]

@VoiGAS I gave up on it. Got tired of battling it. Unfortunately, I’m outside of the 30-day return policy, so I’m stuck with it. I’ll wait for a firmware update that hopefully addresses it. Maybe I’ll just sell it. Went back to my Polar Verity Sense which has never let me down. I don’t have ZoneSense, but at least I have reliable HR.

[Egika]

@atoponce Polar Verity Sense is just optical, isn’t it?
You won’t get R-R data from that one at all.

as far as I know, all electrical HR chest belts can suffer from ESD, and all deal with it in the same or a similar way. But I am no expert.

[snow*]

@Egika said:

as far as I know, all electrical HR chest belts can suffer from ESD

That’s true, @egika, but the noise of SHMR2 (speaking for myself) is definitely higher than, e.g. my Polar H10… I therefore wonder how accurate ZS might be as a result of this

[Speed Man]

My personal workaround was to apply electrical tape over the metal surface on top of the SHRM2 module. I’ve been using it this way, and the performance has been quite stable so far. The only minor inconsistencies occur during sudden pace increases or high-impact movements.! 1000057561.jpg