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PatrickNSF

macrumors 6502a
Original poster
Jan 24, 2011
682
377
My VO2 Max stopped recording nearly two weeks ago (on Sept 10) with my AW Series 4. I run and walk outdoors most days.

I added a Series 6 on Friday and have run three times outdoors with it and still have no new VO2 Max readings. I unpaired and repair the S6 yesterday (and set it up as new) but that doesn't appear to have helped.

Any other suggestions?
 
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MacBird

macrumors 65816
Apr 1, 2010
1,309
1,711
I had the same problem with my AW 4, it stopped recording in June but two days ago it suddenly started recording VO2 Max again, just a few days after installing watchOS 7. I have no idea what changed.
 

jsnuff1

macrumors 6502a
Oct 4, 2003
728
339
NY
How do you get this reading? Just got the series 6 and have done a few hikes/bike rides and don’t see it.
 

Davelfc

macrumors 6502
Mar 2, 2014
388
651
Liverpool
I gave up on apple's vo2 max a while ago, deleted all of the data last month and hoped that would in some way help fix it.
 

Dlanod

macrumors 65816
Jul 11, 2008
1,000
96
UK
Mine also stopped working when I added AW 6 on Friday. Tried everything but no joy.
 

arfung

macrumors member
Jun 27, 2015
87
35
I had this issue on my AW5, WatchOS 7. I had to re-pair the watch with phone (I set up as new) a couple of time, and on the second re-pair, VO2 max is syncing reliably again.
 

Selldit

macrumors newbie
Dec 3, 2019
9
2
I have had this issue since August 13 on my Series 3. On that day I accidentally sent a run from a third party app to health so it was doubled. Then deleted both for some reason (oops). Have unpaired and paired as new multiple times with no success. Did all intermediary steps including resetting fitness calibration. I recently shut off the health data backup, erased my phone, and set up as new with iOS 14 starting from scratch with health data. Then I paired my watch installing no apps and had the same issue. I have a Series 6 shipping soon so I’ll be curious if that fixes it although I’m not confident. Don’t want to report anything to apple and hurt my trade in value lol.

*edit- just noticed now that my health app is all cleaned up my watch isn’t listed under “Data Sources & Access” for V02 Max. Nothing is listed. Probably some super specific bug although I wonder what other settings could be coming over from a standard iCloud sync (not a backup). Next step would be erasing everything and creating another Apple ID just to see what happens I guess.
 
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Selldit

macrumors newbie
Dec 3, 2019
9
2
Niche issue obviously. I believe I’ve figured it out. New Series 6 did not resolve the issue.

In my case this seems to be a bug with using Bluetooth HR monitors. If I use the watch’s built in HR monitor I get V02 max readings. I submitted it to Apple via the feedback app with all my diagnostic data.
 

Selldit

macrumors newbie
Dec 3, 2019
9
2
This is fixed in iOS 14.2/Watch OS 7.2 just in case anybody goes searching and finds this thread.
 

jz0309

Contributor
Sep 25, 2018
10,395
27,241
SoCal
I wish I could get a reading while cycling. I don't run, and I rarely go for walks lately, but I do cycle multiple times per day.
+1
I do not understand why Apple is limiting it to outdoor run/walk/hike ... after all nothing changes with regards to the watch (position on the wrist etc) whatever workout you're doing ...
 
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Selldit

macrumors newbie
Dec 3, 2019
9
2
Same set of issues on IOS 14.3 and Watch OS 7.2 no fix yet
Do you use an external HR monitor? That is what it turned out my issue was related to. If I used the watch HR monitor I would get readings if I used my Bluetooth chest strap I would not. That specific but was resolved in 14.3/7.2 for me.
 

dmfresco

macrumors regular
Sep 8, 2002
222
46
Ann Arbor
I am having the same issue here. Just got a Series 6 watch to replace a Series 4 watch. The last VO2Max reading was Dec 3 with the Series 4 watch as I did not get the new one until Dec 14. I started thinking about the Bluetooth issue. I have a Wahoo Kickr bike trainer that connects via bluetooth. I use that app for outside bike rides and walks from time to time, though no mobile sensor. I also have the Wahoo app sharing data with apps like MapMyRun and Fitness Pal. Might the problem be a function of sharing since WatchOS 7.1 or 7.2? BTW, I tried to reset the fitness calibration but I don't see my AppleWatch Series 6 as a device contributing to Cardiofitness Notifications. Really screwy. Any other break throughs that anyone has found?
 

tugger80

macrumors newbie
Dec 19, 2020
2
0
Do you use an external HR monitor? That is what it turned out my issue was related to. If I used the watch HR monitor I would get readings if I used my Bluetooth chest strap I would not. That specific but was resolved in 14.3/7.2 for me.
I do not use an external monitor. I have taken all the remedial steps suggested by all of the contributors to no avail. The bloody thing simply does not work as advertised, Time for a fitbit, BTW I use a generation 1 iPhone SE, Apple watch 6 all at the current software levels. My wife has an iPhone SE gen 2 and an Apple watch 6 all at current software levels and has the same issues. We are configured differently. I develop Apple apps so technology is not a problem.
 
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Runs For Fun

macrumors 65816
Nov 6, 2017
1,138
2,601
Do you use an external HR monitor? That is what it turned out my issue was related to. If I used the watch HR monitor I would get readings if I used my Bluetooth chest strap I would not. That specific but was resolved in 14.3/7.2 for me.
Hmmm maybe that's why I haven't been getting VO2 Max readings. I always use a chest strap monitor along with my watch. I'll have to give this a try now.
 

Selldit

macrumors newbie
Dec 3, 2019
9
2
+1
I do not understand why Apple is limiting it to outdoor run/walk/hike ... after all nothing changes with regards to the watch (position on the wrist etc)
I do not use an external monitor. I have taken all the remedial steps suggested by all of the contributors to no avail. The bloody thing simply does not work as advertised, Time for a fitbit, BTW I use a generation 1 iPhone SE, Apple watch 6 all at the current software levels. My wife has an iPhone SE gen 2 and an Apple watch 6 all at current software levels and has the same issues. We are configured differently. I develop Apple apps so technology is not a problem.
Sorry to hear that. That sucks. I believe the calculation for V02 max happens on the watch itself. They’d probably do a one time replacement for you.

I reported this through the phone feedback app with my logs a while back. If you develop apps this is definitely more your area of expertise than mine but you’d probably get some mileage reporting it as a bug since they’re pushing the feature heavily with this watch and OS.
 

NME42

macrumors 65816
Sep 15, 2019
1,237
699
I am running with a heart rate monitor and had no VO2max updates since beginning of October. Not quite sure what happened then, but I suspect this is the date where I paired my watch again (due to the GPS issues recording a track).
Nevertheless, I "fixed" the issue by switching off Bluetooth on my iPhone (through settings, not control center) before I went for a run. Since then I get daily VO2max calculations.

Concerning VO2max and cycling: not many hopes as other sport watches behave the same. You need a power meter to have a good basis for calculation, cycling speed is not sufficient as a metric. Imagine riding downhill for one hour with very low heart rate readings, this would produce a very high VO2max when only heart rate and speed are being taken into account. Putting in elevation gains/losses into the equation would be possible but makes things a lot more complicated.
 

MacBird

macrumors 65816
Apr 1, 2010
1,309
1,711
I've come to the conclusion that it is best to ignore VO2max for now. Randomly, it stopped working, then started again a couple of weeks later and it seemed to work fine and the average reading was 48, a couple of days ago it dropped to 34 without any change in my workout routine and is stuck there.
 
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dmfresco

macrumors regular
Sep 8, 2002
222
46
Ann Arbor
I have not had a chance to perform a vigorous workout but I did log an outdoor walk while we walked around town running errands today. Not sure I did anything to provoke a VO2Max reading but I see nothing in the Health App.
 

Ryan1524

macrumors 68020
Apr 9, 2003
2,093
1,422
Canada GTA
It took me 2-3 outdoor walk/run before vo2 max was logged. And another 3-4 before it seems to register something stable.

The first 3-4 readings were very jumpy; specifically measuring much lower on outdoor walks. Not sure if apple expected this to be the brisk walk type of workout...or if any walking is considered a ‘workout’. Probably the former.
 

dmfresco

macrumors regular
Sep 8, 2002
222
46
Ann Arbor
I decided to give Apple Support a try. I got to a senior advisor who was in touch with Apple engineers. I agreed to add some profiles to my phone and watch. I took a walk outside and VO2 Max worked this time. I chose Outdoor Walk as the setting. According to Apple, the only workouts that record VO2 Max are Outdoor Walk, Outdoor Run, and Hike. Not sure what level of vigor or briskness is necessary. To my surprise, it worked. The only adjustment I made was resetting calibration data. Not sure whether it's accurate, but at least my Series 6 watch registered something.
 
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lee_ung

macrumors newbie
Dec 28, 2020
1
0
I decided to give Apple Support a try. I got to a senior advisor who was in touch with Apple engineers. I agreed to add some profiles to my phone and watch. I took a walk outside and VO2 Max worked this time. I chose Outdoor Walk as the setting. According to Apple, the only workouts that record VO2 Max are Outdoor Walk, Outdoor Run, and Hike. Not sure what level of vigor or briskness is necessary. To my surprise, it worked. The only adjustment I made was resetting calibration data. Not sure whether it's accurate, but at least my Series 6 watch registered something.
Which profile you added to phone and watch, I also have the same problem, tried everything but no luck.
 

deedles

macrumors newbie
Jan 25, 2021
1
0
I decided to give Apple Support a try. I got to a senior advisor who was in touch with Apple engineers. I agreed to add some profiles to my phone and watch. I took a walk outside and VO2 Max worked this time. I chose Outdoor Walk as the setting. According to Apple, the only workouts that record VO2 Max are Outdoor Walk, Outdoor Run, and Hike. Not sure what level of vigor or briskness is necessary. To my surprise, it worked. The only adjustment I made was resetting calibration data. Not sure whether it's accurate, but at least my Series 6 watch registered something.
thanks, worked for me!
 
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