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New vo2max without doing any activity for days?

Today I got a new vo2max value (the upper one in the picture used to be 47) although I haven't done any activity for days since I'm sick... How come?

0 jmto over 3 years ago

You have loss weight by being sick?

"VO2 max is measured in milliliters of oxygen used in one minute per kilogram of body weight (mL/kg/min)."

So if you weight less, your VO2max will go up!

0 oBuTTuSo over 3 years ago in reply to jmto

I wish, but it's the other way around due to inactivity :-)

The thing is that the top value has been 47 for the last months but today it changed to 49 without me doing anything... I guess it should only update after recording an activity?

0 e7andy over 3 years ago

You can get new VO2 max values without doing activities.

https://support.garmin.com/en-US/?faq=lWqSVlq3w76z5WoihLy5f8

"VO2 Max Estimate From All-Day Heart Rate
Newer watches are capable of generating VO2 max from all-day heart rate data. VO2 max generated from all-day heart rate will only show if you have not generated VO2 max from another source above, unless the all-day heart rate VO2 max is better than VO2 max generated from other sources."

0 oBuTTuSo over 3 years ago in reply to e7andy

Ah, so now when I haven't ran for weeks or used any bike with a power meter it uses that instead. Then it makes sense, resting into shape ;-)

0 e7andy over 3 years ago in reply to oBuTTuSo

It seems a bit odd that your value would go up but that function is likely the explanation to what you see.