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How do I know if the HRM-Dual worked during my run?

I recently bought the HRM-Dual heart rate monitor with chest strap to use on my runs along with the Vivoactive 4S. I just tried it today, however, I don't understand how to tell if the heart rate data from the run did indeed come from the HRM and not the optical sensor on the watch.

I checked that the sensor was connected before starting the run, but right after I ended the run, another notification popped saying the HRM was "Connected"..... does that indicate it wasn't before (aka during my entire run)?

Theres nothing special, no indication from viewing the heart rate data in the Garmin Connect app whether the heart rate was taken from the watch or the strap. Anyone know how to tell whether the heart rate data is coming from the HRM during my run?

0 ovekvam over 3 years ago

You can have a look behind your watch, if the sensors are lit up.

0 zigford over 3 years ago

On my fenix, there are icons that show up to indicate GPS, heart rate, foot pod and other sensors at the start of a run before you hit start.

I believe the heart icon only shows when an external HRM is connected, not the optical.