Issue with iOS 14 Fitness App and VO2 Max

Morning Apple Community


Is anyone experiencing the following issues:

  • iOS 14 isn’t recording my VO2 Max since updating to Series 6 Apple Watch
  • iOS 14 isn’t reporting my Trends within the Fitness App

If you were experiencing these issues, how did you resolve? Thanks in advance.

iPhone 11 Pro Max, iOS 14

Posted on Sep 22, 2020 7:59 AM

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Question marked as Top-ranking reply

Posted on Dec 14, 2020 8:36 AM

So— I’m back. Here is my story: I contacted Apple and eventually got through to a senior advisor. She was extremely helpful. I sent screenshots of my data, pictures of a workout, and a chart showing declining VO2 max. We installed some analytics to my watch and phone, and then I did my regular workouts for the next couple of days. Afterwards I sent her a couple of screenshots and then was contacted by someone from “Health and Safety.” It appears that my watch did not record my heart rate at certain times so he had me change bands (I had at some point changed from my regular sport band to the metal one because it had gotten dirty). He said the sport band is made to be more accurate. I wore the sport band for the next several days and the VO2 max stayed the same and the heart rate chart was available each time. He says, “they’re not doctors” and can’t analyze the data but if you have a heart rate chart and VO2 max basically the watch is working. He had me tighten my band and move it away from the bone on my wrist (said it shouldn’t be touching it). I want to state that both people I spoke to were EXTREMELY helpful and answered all my questions. The bottom line- the new update is supposed to be more accurate than whatever they had before and Apple is always trying to improve, especially in the field of health and safety.

Did my V02 max improve once I changed bands and tightened the watch band? Not really. It went up .4 and seems to have stabilized there. Overall, I still went down 9 points, so I’m not a happy camper.

if anyone else finds out more, please let us all know. Going out to do my speed walk now. Maybe my VO2 max will improve. Ha!

206 replies

Nov 13, 2020 7:28 PM in response to Nicholas_A_C

I’m so glad to see that others are having this experience. I’m 44, trying to get into good shape. Went from Fitbit to Apple Watch and these better sensors are the reason so please dont make me regret it. Mine went from about 38 steadily down to 34.... getting lower and lower as I continue to work out walking/ jogging 10 mi per day. Why is it going down?!?

Dec 27, 2020 10:19 AM in response to Socrrobinl

Thanks for your feedback. Here is mine.


  • Before update: Vo2max was above 50.
  • After update: Vo2max starts going down. Now it's close to 29.
  • I bought a Polar H10 heart rate band and paired it to my Apple Watch (serie 6) to have better heart rate measure/accuracy in my workouts. I used the Fitness App to record my running workouts. The Vo2max keeps close to 30. So it's not an issue of heart rate band vs optical sensor.
  • I tried Apple Watch recalibration but still having the same output.
  • Finally, I measured my Vo2max with my Polar H10 + Polar Beat App - Stress Test. I've got 56 Vo2max.



Apr 14, 2021 4:17 PM in response to Nicholas_A_C

I recently downloaded the latest operating system - 7.3.3 on a Series 3. I found that the measurements for VO2 have went down ten points since the download. I have a gut feeling that it’s a bug with the update. This is an issue for me because, considering we’re still in a pandemic a year later, I need this information to be as accurate as possible.

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Issue with iOS 14 Fitness App and VO2 Max

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