Venu vo2

I think it is time for Garmin to take Vo2 max from the functions. For me I ended believe not only in Vo2 value but  everything that my watch reports. It is dangerous to believe outcoming of such watchs specially when it  is our health that is all about

I agree. My vo2 was showing superior 49 last weekend. My fitness emproved since with longer consistent run times and over night it dropped from 49 superior to 47. That's impossible. I'm in better shape now then when I was 38. And im 52 next week. Check my activities and decide for yourself. This is not helping as I am goal oriented. 

Hi, how regularly are you doing the kinds of high-intensity activities that the algorithm requires to estimate VO2max? Ie, how much of your recent training history is "orange" activities (high aerobic)?

9094610 said:

My fitness emproved since with longer consistent run times and over night it dropped from 49 superior to 47

Did you do a run on that day? If yes, then check it out, perhaps your performance was not ideal. If not, then perhaps you did not do any run intensive enough to update the VO₂max in the last 30 days, and the sudden drop may be caused by estimating your VO₂max from walking or from the all-day HR, which is way less accurate, of course.

To get a new VO₂max value the run must be an outdoor run with GPS, no UltraTrac, with minimally 10 minutes over 70% of your max HR (15 minutes on Venu).

A too high Max HR value is a very common reason for failing to get a VO₂max update. If you have the auto-detection of the Max HR enabled, then it can easily happen that the Max HR is set way to high due to an accidentally high HR during a workout. Also, people often mistakenly set the highest HR they ever achieved as the Max HR. That's not the right way - you need to be able to sustain the Max HR for up to 30s, so the best way to find it out (apart from a lab test), is a self conducted test (YouTube or google offer many of them) and then setting it manually, and definitely disabling the auto-detection.