Vo2 max not really changing and is off by 35%. I have a separate chat going and my measurements at a test center, Apple Watch, and 1030 are relatively the same, only 1040 different. As reported in other comments, nothing is being done about it. I have 1040. Really disappointed in Garmin and the 1040. When I upgraded from 1030 I thought data would transfer, it didn’t and lost significant history. Separately the vo2 changed significantly, problems with heart rate sensor (polar) not tracking accurately. I’ve had it for a year, thought these things would be resolved. Also disappointed in computer performance as I expected it to be significantly faster.