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.

Mine was doing the same thing for MONTHS. I finally figured out that my watch was somehow on “Power Saving Mode and wasn’t recording heart rate during workouts.

I toggled this off under Watch > Workout > Power Saving Mode. No issues since.

I was able to fix this problem as follows: https://discussions.apple.com/thread/251891529?answerId=253696249022#253696249022

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

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.

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!

I just followed the intsruction/hint above:

“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.”

As my watch did not measure before any data I put manually for 6 month back. Since than my watch measure perfectly....

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.

Had this issue. Worked fine for 2 weeks the just stopped. Tried all methods mentioned in this thread then found the issue.

before doing anything else try wiping the sensor with a wet wipe. Build up of sweat had affected the connection

hope this helps

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 bought a Series 6 to replace my Series 4 and set it up and restored it from the final Series 4 backup and found that no VO2 Max readings were generating. I went into the Health app and did a manual VO2 Max entry and it's been working fine ever since. That’s the only thing I did to try to fix it - no resetting, unpairing or restoring, etc.

I just got my new iwatch 6 and the same thing happened. No vo2max reading, that is until I manually entered a vo2max recording at the lowest level (10).

Then I went for a 30mns walk using the work out app. And lo and behold, the vo2max recording is now working. Try it.

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.

good evening, I replaced version 4 with 6 and I no longer see the vo2max in the health app.

this morning I reinitialized the Apple Watch 6 and activated the airplane mode on it. after a gentle 25 minute walk, the vo2max reappeared! tomorrow I'll do the counter-check and take the airplane mode off the clock.