No new VO2Max registrations after crash. Tips?

How do you verify that you don't get a VO2 registration? The only place where I can see the VO2 for every activity is either at the summary after saving the activity but before going back to the watch face or by external tools such as Runalyze that shows the VO2 for every activity.

The VO2 reports shows your average for the last 7 days (or less depending time frame).

Which activity do you use? If you use Trail Running there is an option to disable (or enable) the VO2 recording. This changed a while back, previously trail running never recorded VO2.

Thanks Tobias,

I'm using the run activity and before the crash, I always had the VO2 results directly in the summary. And also presented in GC app and via the VO2 reports on the connect website. The graph stopped, no new measures since the crash. 

https://support.garmin.com/en-GB/?faq=ULj1XBUa9C5zxtPzhVcgkA#:~:text=VO2%20Max%20Requirements,the%20Running%20or%20Walking%20profiles.

Are your runs hitting the criteria?

Oh is Physio True-up on?

support.garmin.com/.../

regarding this criteria it would be interesting to know why my Fenix 6 ist registering a new VO2max each time i am doing a walking activity - even with a heart-rate constantly between 50-60% of MaxHr (or even below that)

Hi AJR, thanks!

Yes, my last runs hitting the criteria as yo shared.

Checked the True-up, which is on (AFIAK, it was always on). 

Two things keeping me busy:
- Why did I lost the Vo2 measurements in the first place after the watch did a restart by itself (while saving an activity). 
- Support guide is making a statement: it requires a few runs. So far my he picked up the Vo2 measure almost directly after a period of indoor training a few months ago.

I think (and there's a doc somewhere about this) is that if you predominantly walk, then that becomes the criteria for dictating VO2 and it's slightly different.

How many walks / runs do you do a week. If it's mostly walks, and the occasional runs....

I wonder if the restart corrupt the records on the watch, but for some reason it's not re-syncing back via Physio True Up.  Are the records on the website for the time missing on the watch?

Someone else posted this:

1. Running Activity with GPS will yield the most accurate overall VO2 max estimate.

   • Example: You record a Run Activity with GPS (#1 in the list) which generates a VO2 Max Estimate on May 1^st. That reading will display in Garmin Connect and will only show updated readings with additional Run Activities with GPS for the next 30 days. Other activity types in the list (2 through 6) will only update the overall VO2 Max Estimate if the May 1^st activity is older than 30 days because Running is at the top of the hierarchy list. 

2. Cycling Activity with a power meter. When a measurement is achieved, this will always yield a Cycling VO2 max measurement, even if there is also an overall VO2 max measurement from #1 above.

3. Walking Activity with GPS

   • Example: You record a Walking Activity with GPS (#3 in the list) which generates a VO2 Max Estimate on May 1st. The next day, you record a Run Activity with GPS (#1 in the list) which generates a VO2 Max Estimate. The overall VO2 Max Estimate in Garmin Connect will be updated regardless of the age of the Walking activity because Running with GPS is #1 in this list.

i do at about 1 walk a week. And no runs (i am currently using the watch for rowing - so sad that the VO2max can not be set manually, because it differs totally from the rowing test results - a VO2max in walking that is 20 ml/kg/min higher than the results from a lactate step test in my primary sport).

But from what i see the criteria of 70% MaxHr is for both, running and walking. And i did not hit this.

Yeah, so as Walking is your sole VO2max generating activity, thats why every activity  is doing it. 

And yeah, odd about the 70%. Have you checked your HR zones? As you don't run you'll have to set them from either HR Max or HR Reserve. Which do you use? Reserve may be better as that takes RHR into account and at least that is measured directly.

Garmin says: 

Walking VO2 Max Estimate

• • Walking Activity must be 10 minutes or longer in length
    • vivosport requires up to 15 minutes in length
  • The activity must be recorded outdoors with a GPS signal
  • Heart rate data from either a built-in optical heart rate sensor or from a chest strap
  • Heart rate must be elevated to at least 70% of your maximum heart rate for at least 10 minutes continuously
    • vivosport requires up to 15 minutes continuously