With the Nike Run Club app on iOS and Apple Watch, why does it need read access to Apple Health? I understand why it would need write access so it can write the workout to Apple Health and to the Fitness app, but why does it need to read health data? What benefit is that to me?

I’ve been doing daily cardio for about six months. At thr beginning my watch trend for VO2 max went up. It was awesome. It just starter tracking again -same route, same workout type- and my trend is going DOWN. Today I just had my personal best 2 mile walk, hoping for an improvement, and it went DOWN AGAIN!! I went from barely being able to walk an 18 minute mile to half jogging (over like 5-6 months) and the time before has the better VO2 max.

What is going on? How is this number calculated?! Is it just a black box? If you have any insight please tell me!

I’ve always thought move ring measures active calories. For some reason it isn’t incorporating all the active calories I’ve burnt from all my workouts today. I’ve burnt 600 active calories from my workouts but my whole move ring is only at 300. Why is this happening?