Spontaneous climb

The Descent MK1 is based on the Fenix 5. But at the same time, unlike the Fenix 5, they have some drawbacks when measuring sports training.

The main disadvantage is not the correct definition of height. The training performed at the stadium does not have a climb uphill. But the clock determines the climb of 200-300 meters for 5 km of distance. This affects the correct determination of all running characteristics and casts doubt on them.

A diving watch is cool. But I also hoped to run with them))

Below are screenshots of training sessions in the same stadium recorded by different devices Fenix 5 fnd MK1

https://www.dropbox.com/sh/hm6r1on2w7nhhqd/AADIroRFJkEU-aQQUJiTUIOGa?dl=0

For MK1 you can see height / temperature dependence.

Last screenshot - lactate threshold has become smaller after training with a small climb


How can this be fixed?

Thx