Apple

I have been measuring my VO2 max daily for the past 6 months with no problems.

But 3 days ago my Apple Watch stopped measuring. Been trying to fix it for 3 days without any luck.

I use the outdoor walk exercise, and I walkj the same distance in the same tempo every time I measure.

I updated both my iPhone and Apple Watch to the latest software.

Does anyone have any idea why my watch stopped measuring VO2 max and any suggestions on how I can make it start again??

Thank you in advance.