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Hi my average vo2 max score on the Apple Watch has been 48 for the year to date. I always run on a flat surface and average 2.5 -3 miles to achieve this score. My splits are averaging 8:20 a mile. My last 4 workouts with these same splits - the vo2 max score is approx 38. Why would it drop 10 points is nothing has changed ?
Something very similar happened to me in the first week of November. My VO2 was steady at 50-52 since a week or two after I started using my Apple Watch in June. This figure agreed closely with the Garmin watch that I wore previously. Then, in the space of two training sessions done a few days apart, my VO2 max plummeted to 38 and has remained there ever since. It makes no sense because my times and heart rates for similar workouts have not changed. I think this timing coincided with when I installed a software update on either my watch or my iPhone, so I agree with another commenter who suggested Apple could have changed their algorithm for calculating VO2 max. However something must be wacky with either the new algorithm or the old one, which doesn’t promote a lot of confidence in Apple’s approach to VO2 max.
Still working for me.
I have been facing the same scenario, but my vo2 max is going down in points inspite my heart rate going down for the same distance in lesser time and on the same track
The calculation of VO2 max by apple seems intransparent. This is part of the problem here it seems.
Vo2 max dropped
