Just ran a ran a 1:29 half marathon but race prediction still showing 1:34!!

Did your effort yield a new VO2max prompt from your Garmin watch? If not, the estimates will still be a few minutes off, as you may see...

Same VO2max but have seen half marathon prediction swing 5mins while on same VO2max

 Check this on a 5K prediction!

The race prediction should be related to your vo2max.

Looks like your vo2max is not catching up fast enough as reported by many others.

How is your vo2max trend past few weeks or months ?

Don't trust to much in your watch. What happens during a race is not an algorithm, it's a mix of things(heart, mind, muscles...). If my coach says my race time will be 1:40, if I race in 1:38 I don't think my coach has a BUG 

I think the point is that after running faster than the prediction, we would expect that prediction to update to your fastest time at a minimum. I have the same problem with 5K and 10K predictions. I consistently run faster than the predicitons in practice and they do not move. This has been since getting the 955. Fenix 6 predictions were a bit closer to me.

Same case. But first noticed VO2max is not changing anymore since I use FR955. Wouldn't surprise me if this is related. But Garmin should know. In fact I think Garmin knows this, but is looking for the solution…..

Arrgh, Comon. This is a crazy comment- about this another bug?!?!?

Everyone knows that getting a number on your chest and running together with other, changes your capabilities mostly in a positive way + a lot of other things can change your result (Like weather, sleep socre and energy intake just to mention three)

The Race prediction is a formula and based upon your VO2Max - The details are,I guess a trade secret.

I know that a few things are not good with this watch, but this so is far out!


 

You are just to good for this watch. You have to change it for coros ;P 

There are many factors. You just said some of them.

But let's just fix the stuck vo2max first.