How to fix vo2 not working after iOS 26.1 update?
since updating to ios 26.1 my vo2 has stopped working
[Re-Titled by Moderator]
Original Title: vo2 stopped working
iPhone 14, iOS 26
Did you already try to force restart your iPhone and Apple Watch?
Force restart iPhone - Apple Support
To force restart your watch, press and hold the Digital Crown and the Side button together for about 10sec, until the Apple logo comes back again.
In case this does not work, unpairing and setting the watch up as a new device, without using the latest backup would be the way to rule out a software issue, caused by defective data from the backup.
Unpair and erase your Apple Watch - Apple Support