I'm not sure because as explained, on the same bike loop done at the same intensity : - Heart rate monitoring recorded correctly with eBike app - Heart rate monitoring not correct if i use Backcountry skiing app => It seems that the issue is linked to the backcountry skiing app. Next step : I will try to log a Ski touring day with the eBike app.
The Garmin Fenix 6’s Smart Trainer mode only has one annoying issue. Heart rate readings from the optical sensor on the back of the watch are disabled when connected.
Download PDF Print Page Share Link Tips for Erratic Heart Rate Data If the heart rate data is erratic or does not appear, you can try these tips. Clean and dry your arm before putting on the device. Avoid wearing sunscreen, lotion, and insect repellent under the device. Avoid scratching the heart rate sensor on the back of the device.

Here is my comparison of HR data from the chest strap and OHR. Garmin Fenix 7S gave up to -59 bpm difference in HR data compared to the chest strap. Here is my comparison for my night’s average HR with Oura. Seems to be that Garmin misses a lot of spikes in HR (Oura has studies of its accuracy like this

This is still an issue. I have the exact same problem. New Forerunner 45, Garmin Connect Web shows heart rate in activity details but does not show heart data in the heart rate widget. It did last week and now does not, even when there is heart data in the detail of an activity for that same time span.
When riding, use ONLY Edge which is connected to all your bike stuff and hrm. All stats are synced with Garmin Connect and they show up in your watch..things like vo2max, training load etc. When running or anything not bike, use your watch. I'm also using a Fenix 7 and edge 1030.
After the Fenix 6 powered back up, the numbers on the watch matched (roughly enough) the numbers on the Tickr and finger monitor. Fortunately, this has only happened once, and I was going to write it off as a bit of one-off weirdness until I saw this post on the Garmin forums. Clearly not just me, and here again, Garmin has some work to do.
Now that we have identified some potential causes for Armin not tracking your heart rate properly, let’s explore some troubleshooting tips to help you get back on track: 1. Ensure Proper Device Placement. Double-check that you’re wearing your Garmin device correctly, with the sensor in direct contact with your skin.
Connecting Sensors to The Tacx Training App | Garmin Customer Support. FREE GROUND SHIPPING ON ORDERS $25 AND UP. Garmin Support Center. Garmin Support Center is where you will find answers to frequently asked questions and resources to help with all of your Garmin products.
tDysLL.
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    • garmin fenix heart rate not working