Apple Watch Fitness
I can't start a workout anymore on Apple Watch Fitness
iPhone 7, iOS 15
Question marked as
Go through the processes here
Start a workout on Apple Watch – Apple Support (UK)
if it still does not work
First force restart the Watch
i.e. press and hold both the side button and Digital Crown for at least 10 seconds, then release both buttons when you see the Apple logo.
Then, although it may seem irrelevant, Force Restart the paired iphone Force restart iPhone – Apple Support (UK)
If it is still misbehaving...
Unpair and erase your Apple Watch
and then
If no better you may want to unpair then set up without restoring the backup.
If you've completed that troubleshooting and the issue is still not resolved, Contact Support.
Click here > Contact - Official Apple Support
or phone numbers
Click here > Contact Apple for support and service - Apple Support