Fenix 7 Pro Solar - Low bpm during running

Cold weather makes it harder to detect your pulse. Use a HR belt instead. 

Thanks... Is a possibility, I've read a lot about, but the previous activity two days ago the weather was the same and tracking more accurate. Can be maybe a bug of the watch?  

I'd love to know if somebody had have the same problem

Otherwise, the solution could be the HRM Pro Plus belt 

Thanks AgentMax

Sigfredo Haro said:

the solution could be the HRM Pro Plus belt

Yes, if a consistently accurate HR is important to you. Seems like it is.

The optical heart rate sensor "sees" the pulsing blood in the users vessels and can thus measure the pulse. If the user is cold surface blood vessels contract especially in the extremities making the pulsing blood harder for the sensor to see.

In summertime and indoors I use only the watch's own sensor, but in the winter it's completely useless and I use an Polar OH1 optical sensor I wear on my upper arm.

Sigfredo Haro said:

I'd love to know if somebody had have the same problem

A quick search of the forum will yield that information. It’s ongoing and has been ongoing since OHR came out. 

Sorry, I was searching, but maybe I didn't type the good keywords 

I'll check next activities (mostly during the night when is cooler), but it seems like HRM Pro Plus is a good Christmas gift for me... have to check with the family, hahaha

Thanks everybody for the help

So, today the watch tracked correctly the HR... AVG 157bmp, more or less my average. And the weather was freezing! -2°C, but sunny 

I assume that in the last activity, it didn't worked cause a bug on the new firmware. But I'll be aware in the next workouts.

Thanks again for you help