Hello, i run a semi marathon last sunday in 1:33'00, my FR255 said after the race this prediction, how it's possible ?
Hello, i run a semi marathon last sunday in 1:33'00, my FR255 said after the race this prediction, how it's possible ?
I can tell one thing.
I was doing trail running with 100m elevation.
My prediction for 5k was 35 minutes, because it did not account elevation ...
So I ran 2 times flat, the prediction changed to 30 minutes, actually I ran 28 minutes.
So there are certain uncertainties there 
