VO2max decreasing after installing 16.30

Since installing version 16.30, the running VO2max is constantly decreasing, even though I did not change my training. I started with 52/53 (keeping that stable for more than a year) and now, just after one week, it reports 48.

Anyone else with such an experience?

0 Andrewj-5991 over 3 years ago

My vo2 max has also decreased with the 16.30 firmware while my PB's have gotten quicker. Could just be a coincidence though as VO2 max looks at HR not just pace....

0 Yannis77 over 3 years ago

Are you going for trail runs? Newer FW versions calculate vo2max for trail activities and this is bound to lower your vo2max.

What was the previous fw version?

0 gspinoza over 3 years ago

Maybe they're just correcting the false readings on 15.20. I'm out of shape since a back injury, so I basically just walk (while I used to run before), but my VO2max is increasing steadily...

0 SPIRITOFPHOTOGRAPHY over 3 years ago in reply to Yannis77

I noticed this after installing the 16.30 as an "upgrade" from 16.10. Before I was always using the release version, not the RC.

0 Labronico over 3 years ago

Maybe just because temperatures are raising with the spring, however I too am seeing a noticeable performance drop with 16.30.

0 Au Thon over 3 years ago

My VO2 decreased since the 15.20 update, I haven’t been able to go back to the numbers I had in 2020 despite the fact I haven´t stopped running. It went form a 51 to a 44, it seems the more I run, in worst shape I´m in.

You guys have a 16.30 update? why is it not available for my watch? 6X sapphire.

0 Au Thon over 3 years ago in reply to Au Thon

I see, It´s still in beta...

0 707-707-707 over 3 years ago

16.30, today increased

0 shandel23 over 3 years ago

Mine has been steadily going down since then also. Definitely an algorithm change since my training is pretty consistent. I went from a very consistent 65/66 steadily down to 64, 63, 62, 61, 60 and then yesterday a 59! And yet I'm just as fast on the same trails with the same relative HR/exertion and sleep quality/stress/RHR. I thought Garmin was punishing me for turning 50! JK. Actually, it did coincide with their update to include trail running VO2Max analysis, so maybe that has something to do with it. The also may not be properly taking into account the elevation changes during trail runs, which are mostly mountains for me.

0 imcluelesstoday over 3 years ago

Thats a total bummer. Mine is already super low. But i believe its due to me relying 100% on fenix 6 HR sensor. It does record HR high on runs. I just bumped up to 16.30. Will have to do a few outdoor runs to test. Heck, i need mine to go up!