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735xt stopped calculating VO2 Max

The last VO2Max value I see on the Garmin Connect app is from Dec 2. All my runs since that day didn't produce any VO2Max values, even though I've met the relevant criteria (running outdoors, longer than 15 minutes, etc.). Any idea what might be causing this?

Thanks,

Ido.

0 tmk2 over 3 years ago

Ido1 said:
Any idea what might be causing this?

Missing and/or unreliable heart rate data, or using a run profile which does not support vo2max, like for example trail run.

0 Ido1 over 3 years ago in reply to tmk2

Thanks, but that's not it.

In any case, I've had a chat with Garmin support and they suggested deleting a bunch of directories from the watch and then wait and see if that helps within 2 weeks.