Apple Ultra Watch VO2 Max

I had the same issue with my apple watch ultra. Suddenly, it stop logging vo2 max data. I unpaired the watch, erased all content and settings on my iPhone 14 Pro max iOS 16.1.1 and set it as an NEW iPhone. The Problem wasn’t resolved. However, after putting my Apple Watch ultra in airplane mode and did an outdoor walk of 22 minutes (brisk) it finally worked.

Possible Solutions for Vo2Max

1.Tighten the watch band a touch and clean the sensors on the bottom of the watch..

2.Reset fitness calibration.

3.Input a VO2 max figure manually based off your last record from the health app then re-calibrate the watch.

4.Put the watch in airplane mode,do a walking/running or hiking workout of at least 20 minutes,when you've finished turn airplane mode off and let the watch sync the data to the phone.