Vo2MAX readings on Apple Watch changed suddenly
My Vo2MAX increased constantly and in line with increasing running 6 days a week for 18 months. I’ve had an Apple Watch S1, S3, and S4 currently. Suddenly with the introduction of iOS13/Watch OS6 my 36.9 collapsed 6 points to 30 overnight. It’s now constantly staying the same despite medical tests telling me it’s at 38.7 which isn’t bad for a 58 year old who lost 80lbs two years ago and used to be 25.2.
So is there some way of calibrating it? Why is it like it on my S4 but is stable as was on my partners S3 I used for a week to test it, at 37.2!
Apple Watch Series 4, watchOS 6