@Ian-Beveridge Post the R-R data graph from Runalyze as @MKPotts did. I would bet yours is very bad. If poor, this is why your ZS data is not parsed to the app. From the HR traces on your watch something looks off. Just saw your last post, if no R-R data is in Runalyze then there is clearly something wrong with the belt and not the watch. Are you using the Suunto Run. Here is an image from my last exercise using the Suunto Smartsensor belt with Suunto Run. I was doing an interval workout 4x3 min hard so I expected my AT to be off, LT was good. [image: 1759356430146-img_0155.jpeg] [image: 1759356430192-img_0154.jpeg]

@Liam552 have you done a couple of outdoor runs (at least 5km or ~ 20mins) with GPS on?

@Mikhail-D. if the time is off be more than a few seconds without syncing, something is defect -> contact customer service

@frullewulle same here, no issues since update

@yanosz nope

I’m experiencing similar connectivity issues after upgrading to an iPhone 17. Although the Suunto app indicates that my watch is not connected, the Bluetooth settings on my iPhone clearly show that the device is paired. The only temporary workaround I’ve found so far is performing a soft reset on the watch. However, this solution only lasts for a few minutes to a few hours before the connection becomes unstable again, frequently dropping in and out.

@Tieutieu identical experiences - and opinions/assessments - of friends and myself about the unexplained and frustrating results of the ‘classification’ of runs (rides, walks etc work as usual). Extremely annoying, and creating quite strong reactions.

@brave_dave and another night of complete tracking error. This time just randomly half an hour after I fell asleep.

@SODIUM I absolutely don’t believe in such wrist watches for my real health monitoring, but when they claim and advertise based on such facilities, it should be close by, not a 15% difference and completely inaccurate. The tool I used to compare is the pocket tool from my expedition kit, which is widely used. Have a good weekend

@Tieutieu Interesting, maybe the power supply was not clean. It’s the last time I connect to a socket like this. Mine gave specific error information after it finally recovered: [image: 1758300119590-1.jpeg] [image: 1758300125184-2.jpeg]

@SamuelP thanks for checking and validating my observation. Good to know at least it’s not something specifically wrong with my watch or setup.

@Hoffmann I have a new Race S and the heart rate is way too high during runs. v disappointed. is there any way to fix this?

J’aurai aussi aimé que ça soit disponible sur race S

@isazi But why? I’m not convinced by such answers. What is a good reason to implement this way? This feature is still available on older products, even though they don’t have the powerful hardware that new watches have today. I don’t need many settings for daily activities, but when a customised option is offered, it should stay as I set it until I choose to change it. When I customise my outdoor activities, I want them to remain the way I configure them, not the way software engineers decide, which forces me to check every time. That isn’t true customisation. The bigger question is: why aren’t support agents giving a clear answer about this? When I asked, they told me, “You can’t change anything with the built-in outdoor activity; you must create your own workout, customise it, and save it.” Ok, I did that too, and that solution doesn’t work either. If Suunto is promoting a customised watch, then it should truly allow customisation that stays saved for the next activity until we, the users, decide otherwise. It shouldn’t automatically revert to standard settings, making us check and adjust everything back to our preference each time.