Apple Watch 6 - No Vo2 Max data

Mine was recording fine until I had to do a restore to get my gps and other data back in sync.

It stopped recording at that point.

I have got it back working it would seem by resetting the fitness calibration data

From your iPhone>Watch>Privacy>Reset Fitness Calibration Data>Tap this

you just get a confirmation box that tells you that your metrics will not be as good if you to this.

Tap confirm and do it. You will get nothing else, no confirmation but it is done.

The go for a 20 minute run or walk using the workout app at your normal speed on a flat road/path etc

this will re-calibrate the watch.

The next time you do a workout (not this time) it should show your V02 max

That is what worked for me.

"manually entering" a value (is everyone just inventing it from the scratch?) also didn't help.

I am sorry, but is there anyone trying to SOLVE this issue, or is it just a random collection of troubleshooting ideas that might or might not work?

The VO2 max reading is a bit finicky. For me it records the readings consistently for several days and then skips for week - even when I don’t the the duration and intensity - and then starts to show again.

It would be help if the watch or health app provides a reason for not recording. Then one can alter the workout or diagnose the issue.

It is quite annoying to see missing readings with no feedback from the watch or health app.

Resolved VO2 Max data issue with iWatch update OS 7.1

My Apple Watch 6, stopped recording the VO2 Max data in health app on 24th October - possibly after I upgraded my iPhone to OS 14.1

I called Apple support to no avail. Unpaired and re-paired. That didn’t work.

However updating the iWatch to OS 7.1 appears to resolved the issue for me.

I took the following steps:

1. Turned off both the iPhone and iWatch.
2. switched on the iPhone
3. put the iWatch on charger which also automatically restarted it
4. triggered the update from Watch app on the iPhone.

The update took about 30 minutes to complete, after which I went out for a walk. Although I walked only 25 minutes, the VO2 max data appeared on the health app, when I checked it later at home.

I've had the same issue as well on my Apple Watch 6, and having gotten nowhere online finally called Apple Support. The tech informed me that the VO2 Max readings are only available for a limited number of exercise types - primarily outdoor running, hiking and walking. The watch needs the following criteria to capture VO2 Max:

• outdoor (not indoor) activity
• distance covered via built-in GPS (hence why indoor exercise doesn't count)
• a minimum of 20 minutes of continuous activity

For one reason or another outdoor cycling and mountain biking do not qualify for VO2 max capture. So, unless you are outdoors on your feet for at least 20 minutes, don't expect VO2 Max data to show up - at least for now.

I got an SE last week and it didn't record VO2 Max despite having done a couple of outdoor walks. The watch didn't appear as a data source either. I first tried these steps, which didn't help:

• Entered a manual VO2 Max reading (37) a few days back in time.
• Reset the fitness calibration data
• Did a 25 minute outdoor walk

The next day I did this:

• Put my phone in airplane mode and made sure that bluetooth also was off. Normal airplane mode won't disable bluetooth if you have an Apple Watch. I checked on the watch that it was completely cut off from the phone.
• Did a 25 minute outdoor walk.

And that did it! When the walk was finished I had a VO2 Max reading with the watch as data source!

Today I did another walk, the exact same route, but with my watch fully connected to the phone. After the walk I got a new data point, so it seems to be working as it should.

I have this problem as well, upgraded from a Series 5, completed my first outdoor run followed by an outdoor walk, and there is no VO2 Max data. I'm running 14.0.1 on my iPhone SE 2 and 7.0.1 on my Apple Watch Series 6 GPS + Cellular. Disappointing to say the least with the addition of the SpO2 sensors.

All, I got it finally ( VO2max) readings! Do all the troubleshooting a, then tight the watch just backward the knock on ur hand. I did 25 min run with watch as usual wear and no readings, then I moved it backward and tighten it little, then I been able to get readings for my watch and finally it started showing data source as my apple watch

special thanks for James from Apple support and thanks a lot for calling back today morning

Thanks. This is helpful.

My replacement Watch failed to record VO2 max for a week saying no data sources despite I never stop with the same routine. Genius Bar have no clue too. After numerous unpair and repair, I then followed the methods stated here. I input VO2 max manually base on my last record from the health apps then re-calibrate. I did an open walk for 25 mins immediately in the morning but still no record. I did another one in the evening and suddenly both record appeared. The surprise is my VO2 max is a lot higher than my last records! Still a happy ending.

i have upgraded from apple watch nike 3 to 6. same issue as above tried all suggestions above

going back apple watch 3 very disappointed...rushed to release this before it was working properly

poor product if you ask me..need bit work.

See if i can return for refund.

This worked for me. My apple 6 watch wasn't even showing up as a data source for Vo2 max. I reset fitness calibration data, went for a walk with the app, and then the watch showed up as a data source and my Vo2 max showed up as a reading at the end of the walk. After my next run, I'll report back to see if it's still working.

See my response and suggestion above. It works fine for me. In fact I attempted twice to walk/run while connected to the phone - just to check - and it didn’t record vo2 max.

I just completed a run with both wifi and Bluetooth turned off and it registered a reading without a problem.

It's still working. I don't run with my phone, so the phone connection was never an issue (I have cellular on my watch.)

I'd maybe try to disconnect and reconnect the watch to your phone, then recalibrate?

I had the same V02 max issue with my new watch that arrived Nov 2020. within 3 days V02 decreased by 5 ml(kg.min). Simple fix (for me):

Go to Apple Watch app settings

> Privacy > Reset Fitness Calibration Data > Reset.

Note: you will see a warning that fitness data will be deleted. THIS DID NOT OCCUR WITH MY APP.

Everything back to relative normal.

Happy Thanksgiving!