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Vigourous intensity minutes missing

Former Member over 4 years ago

I have a forerunner 645 music. I regularly record runs where I go into heart rate zones 4 and 5 but I get 0 minutes of vigourous intensity. Any ideas?

0 trux over 4 years ago

Garmin watches do not necessarily use the zones for calculating Intensity Minutes. Most devices with wrist-based heart rate sensors will calculate intensity minutes by comparing your current heart rate to your average resting heart rate.

Then, you also have to keep the effort longer than 10 sonsecutive minutes for having the Intensity Minutes (IM) added. From the description it is unclear whether the same time limit is valid for the Vigorous Minutes (VM) alone too, but definitely IM + VM time needs to be > 10 min consecutive.

Read more details in the document How Does the Intensity Minutes Feature Work on My Garmin Watch?