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Yoga Activity: Stress Field Goes Blank after 12 minutes

So in the Yoga activity, I have the stress field and it works in the beginning and then after 12 minutes or so, it goes blank and in the app, it stops displaying any further data on the graph.

Can anyone tell me what's going on and how this works and how that stress calculation is actually made?

Below is a screenshot where the stress measurement madd it to about 14:00. The HRM will display that the watch is going further and still getting other data

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0 Garmin - Chris over 3 years ago

Your stress field readings are coming directly from your OHR sensor readings. Please review your prior synced Yoga activities. Are you seeing the same stress drop off issue but still show your OHR was recorded during the entire Yoga activity?

0 NoTrux over 3 years ago in reply to Garmin - Chris

Hi Chris, thanks for checking in.

Yep, every single time. It's roughly after 12 minutes or so, but has extended to about 15 in this one. I can also verify HRM readings are not falling off because I view them on my phone in the Garmin Connect App as well.

0 Garmin - Chris over 3 years ago in reply to NoTrux

I am sending you a Private Message to work with you further.

0 NoTrux over 3 years ago in reply to Garmin - Chris

Thanks, on standby.

0 Garmin - Chris over 3 years ago in reply to NoTrux

PM Sent. Thanks again for your post to bring attention to your issue.

0 3409779 over 2 years ago in reply to Garmin - Chris

Just replying here to draw your attention to the fact that this OG Instinct seems have had a fault with regards to stress.

I know this thread is 2 years old, now. But the fact that it seems to have recorded stress and then stops seems weird.

I don't think OP mentioned whether the stress was also missing during the daily graph but I'd presume it was

0 trux over 2 years ago in reply to 3409779

The stress measuring is based on the HR Variability, and a wrist worn optical HRM is capable to detect it only when you are relatively still, with little motion involved. While it may work for a typical quiet and relaxed yoga session, it does not mean it works also at intensive sessions when you move enough to disturb the HRV measuring. You may get slightly better results when using a HRM chest strap.