@MKPotts Thanks for that, I’ve also been going with the tighter hole & as yet my hand hasn’t fallen off. I’ve started doing wrist rotations with dumbbells to try & bulk up to the next hole LOL TBH I found the original Race strap really comfortable & could adjust it perfectly for my wrist (just a bit boring in plain black).

@flexh88 I don’t think anything has changed on the smart sensor. The belt was updated a few years ago to make it more durable. I’m using ZoneSense with a polar H10, which had the advantage of cheep 3rd party replacement belt supply. The advantages of the smart sensor over the H10 is the smaller size/weight and the capability to store HR data in is memory while BT connection is broken (like in the pool).

@Mff73 I reported some observations from different tests here: https://forum.suunto.com/topic/10353/strange-behaviour-with-garmin-hrm/13?_=1715781410812 My heart rate monitor is 3 years old but I have no reasons to think it works bad (it doesn’t with other devices). I believe that for me this high/low readings at the start of the activity happen mostly when I wear a synthetic windproof jacket, but also cheap synthetic t-shirts without the jacket (it’s getting warm now!) seem to cause this problem.

@Egika interesting, must be, because Seal was on the FCC test report.

I have the same issue with my new HR Suunto belt and my S9PP. I had the same with the Ambit 3 and my old belt, this was much worst though. I always thought it was linked to dry skin and not enough sweat. Strangely this does not happen when I ride my bike, only when running.

@Ecki-D. To complement, maybe that would help too. When you use the activity you don’t need to have HR wist additionally turned on, OHR starts automatically. The rest was perfectly explained by @Mff73 .

@talha it started working again with the last update (2.39.20) however due to the subsiquent downgrade it has stopped connecting again. so just waiting for the bug fix release and hopefully i will be up and running ‍️again

@Maryn yeah, good point

by the way i am using garmin hear rate belt. it works fine with my suunto race S

@tinten.addi Got it, I just checked out the UK website and it is the old style.They have changed the website in the US and it does not have several of the items that are available in the UK. Having said that, the Run is in stock in the US so… Suunto is so special.

@alschmid said in Brown leather wristband for Suunto Vertical (Solar): anyone else missing the “classic brown leather strap” for the Suunto Vertical (Solar) model? The blue and black leather wristband for the SV seem to look quite nice (besides the pricing). However, the standard silicone strap is black already, and seldomly do I wear blue belts and shoes… Not me, But that surely a good good choice…

@Mff73 Thanks for the explanation, I learned something new

I used to get chaffed when using a neo for swimming until I read that others aply vaseline maybe give that a try just at the problematik spots.

@Gunnar said in Suunto Athletics 7 loop strap: @Stefano-M64 at least for me the stress on this part happens when you open the strap and it hits the spring. mine stops at the first velcro pad, maybe because I can pull the watch out very easily (L size)

@stromdiddily did you check the belt instead of the sensor ? https://forum.suunto.com/post/124621 if the belt is not waking up the sensor properly, then, probably the sensor looks dead. just to be sure, do you have tested another new fresh battery ? i sometimes have new batteries somehow not powerful enough despite new according to the video, try to plug the sensor on the belt and put both belt electrode in contact to each of them (like short circuit), if it definitively not make the sensor seeable, it is probably dead or something we may not think about

@Patrick-Holling Cheers from Hamburg

@sartoric Fair point but considering my old version has performed perfectly for over 10 years I would’ve happily bought another one I’ll just be happy to have a working belt again as I used the watch OHR yesterday & the end result was laughable [image: 1752997598199-60e0f61c-4a40-40a8-a02e-697aac00aaf3-image.png]

@Stefano-M64 If I understood it right both models are basically the same. The only difference ist that the plus is MDR certified (and therefor mor expensive) so that you could use the ECG readings in clinical settings. So you are right, the HR2 would be the better alternative for sports

Since I have somewhat of a scientist’s ethos and realised that the Suunto HR belt with module could be used in four different combinations, I felt that I also had to provide data for all of them, to prove or disprove the warning in this topic’s heading; “Beware module orientation”. The belt itself can be worn ‘correctly’ with the closing hook and loop on the left side of the torso (hook going down through the loop), or upside down on the right side of the torso with the hook going up through the loop. On my belt there are no markings at the electrode ‘snap-in holes’ other than the in-between text “MOVESENSE”. The ‘correct’ belt position still feels awkward to me after half a year of usage since I’ve had so many years with both Garmin and Polar belts, which both close on the right side of the torso… On this belt then, the module can be snapped in correctly, with the SUUNTO logo pointing upwards (red triangle above text) aligning with the reading of the MOVESENSE text orientation, or be flipped into an incorrect position upside down. The module has markings of L and R at the electrodes but, as said, nothing corresponding on my belt. Calling ‘correct’ position Up and incorrect Down I have logged the following results: BeltUp-ModuleUp (Pulse OK, HRV OK) BeltUp-ModuleDown (Pulse OK, HRV Not-OK) BeltDown-ModuleUp (Pulse OK, HRV OK) BeltDown-ModuleDown (Pulse Not-OK, HRV Not-OK) In my opening postings of this subject I included screenshots from the first two combinations. Looking at the third and fourth results, where one had OK pulse while the other had massive misreadings might be a fluke with either one, OR the last combination really do exacerbate the position problem. No way to know without doing a large number of experiment sessions. I’ll skip screenshots from the BeltDown-ModuleUp (Pulse OK, HRV OK) session Wed 30/7 since it was so clean in both areas. I’m using the OHR of a Garmin FR955 with the old Firmware 19.18 as control - normal result is +1 to +2 bpm against both a Polar H10 and the Suunto belt at all kinds of running efforts (my skin/wrist really agrees with OHR, also on the Race S). Instead I will end this posting with data from yesterday Fri 1/8 BeltDown-ModuleDown (Pulse Not-OK, HRV Not-OK) and a closing BeltUp-ModuleUp (Pulse OK, HRV OK) from today Sat 2/8 to really underscore that my belt is A-OK in a correct position. Not worn out, and locked to a constant length by a safety pin at the adjustment point. Fri 1/8 BeltDown-ModuleDown (Pulse Not-OK, HRV Not-OK): [image: 1754147758046-1000008639.jpg] [image: 1754147816494-1000008640.jpg] [image: 1754147848503-1000008641.jpg] Sat 2/8 BeltUp-ModuleUp (Pulse OK, HRV OK): [image: 1754147943930-1000008642.jpg] [image: 1754147990362-1000008643.jpg] The only conclusion I can draw is that some sensor inside the module interferes with the HRV and possibly HR data when not in an imagined ‘correct’ position. This then would most probably be a software problem. But since I am not offered any method to upload a new SW version, it might as well be called a hardware defect.

@twekkel that is really impressive battery usage.