@sky-runner I had the same problem with the calculation of positive and negative elevation gain. I sent my Suunto Race to the Suunto repair center to have the barometric sensor checked, and they replaced it because it was faulty. Since the repair, the calculation of positive and negative elevation gain is excellent, with very small differences compared to Strava, for example. The problem likely stems from the barometric sensor and the altitude measurement when you’re at home. If the value isn’t stable, the sensor needs to be replaced.