As can be seen from the trace Strava by Ondrej Cink, Mathieu and Ondrej Cink carried out some works (rhythm variations in MTB) on the Eira Pass (about 7km), repeating it 4 times, with the last time up to Mottolino (naturally without chair lift) and then descending from the park, where Van Der Poel made a fairly high drop with his Canyon Lux.
Such works, on high ground, are heavy given the lack of oxygen. Here is thetraining on strava.
