Hi,
Today I ran 30k with my wife. But my Fenix 5x watch measured it at 26.5k. My wife's Polar M400 measured correctly :)
The annex contains GPS track log. I think that the weirdness of the track records, especially where I marked them, is a situation that needs to be examined. It created a very interesting track record on the last lap.
There is also the possibility that this may be related to the Running Power I installed the night before. Because another friend of mine had the same situation.
