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F935 - Vo2 max is not update or calculating

Hi there,

I have a Forerunner 935 since december 2019. And so far I think it work's ok.

But this week a notice that the VO2 max. is not updating or ir not calculate.

The last value I have is form 18th April.

I was looking to see what is necessary to calculate the VO2 max, and I saw that it's only necessary a run 2 times per week to do so.

So I made a map with the values of the last day that that it calculate the VO2 max, and the next 2 weeks to make a comparison and try to figure out why didn't calculate.

The map is this one:

Hope you can help figure out if the watch is malfunction or not.

Thank you in advance for you help

Kind Regards,

Nidia Ponte

Top Replies

Roedema over 4 years ago +1

I should have said that you need to run outdoors with GPS using the Running app and not the Trail Running app, because the latter does not compute VO2max. (The terrain slows down your pace and makes it…

All Replies

0 Roedema over 4 years ago

Are you running outdoors with GPS enabled?

0 Nidia Ponte over 4 years ago in reply to Roedema

Yes,

And I got one more reading on the 20th of May, but after that one, I didnt got anymore.

The condition of the training are the same, so why it read in some days and in another does not?

As you can see in the chart above the values are similar, but that are day better than others, but even so in those better days V02 is not calculating.

What it seams is that it only ready once or twice a month, is that correct? Anda why those day?

0 Roedema over 4 years ago

I should have said that you need to run outdoors with GPS using the Running app and not the Trail Running app, because the latter does not compute VO2max. (The terrain slows down your pace and makes it incomparable to the road.)

Where are you getting your VO2max? The watch may not highlight it at the end of a run if it hasn't changed, though I believe it's always accessible at the end of a run and certainly from the Performance widget as well as Garmin Connect (mobile or web). Do you see a weekly history on the following page?

https://connect.garmin.com/modern/report/21/wellness/last_four_weeks

If you want to see how the VO2max estimate has changed with each run, you can get a number with two decimal places from Runalyze, though it's more useful to look at long-term trends.

0 Nidia Ponte over 4 years ago in reply to Roedema

Thank you for you input. I do use the Running app with GPS. And normal I see it the the app of the phone.

I'm going analyse the rest of you information carefully.

Thank you.

Kind Regards,

0 Nidia Ponte over 4 years ago

In the site of the internet as you can see only mesure once a month.

But in the app of the mobile I have more readings has show

Thanks again for your input.

0 Roedema over 4 years ago in reply to Nidia Ponte

Ah, I see. I don't often use the phone app, but mine does have VO2max for every road run. What about this view on the web? There is currently a bug affecting how my training status and load are displayed, but I can see every VO2max value for the past 4 weeks, and periodic values for the past 6 or 12 months.

https://connect.garmin.com/modern/report/-1/all/last_four_weeks

If it's not there then it's safe to assume the error is in the recording. Either way, since you're not getting many responses, you may want to contact Garmin Support. At the moment, chat support is unavailable, so they may be overwhelmed.

0 peseriusz over 4 years ago

Did you try to do VO2 max test from Run - Training options on watch?

0 Nidia Ponte over 4 years ago in reply to Roedema

Thank you @Roedema. The view of the past 4 week is empty. So maybe is as you say is not recording.

Thank you againd for your input.

0 Nidia Ponte over 4 years ago in reply to peseriusz

Hi peseriusz no I didn't try that. I need to see how it works and will try, thank you for the suggestion.