For proper classic ski technique, the treadmill bed may be too short. (But I’m not an XC skier by training, so I don’t know for sure.) For running and hiking, however, the bed is long enough.
What does “plegable” mean?
is it enough 15% to train?
To train for what? For most mountain sports, 15% is fine. More would be better if training for mountaineering ski mountaineering or steep races, but 15% is the most common.
Are the Proform treadmills a good opción?
I’m not familiar with ProForm. NordicTrack incline trainers go very steep, but their speeds are very inaccurate (faster than the display as the angle increases). Speeds on a FreeMotion (basically a higher-end NordicTrack) are accurate. Woodway is ideal because speeds are accurate and they have very few useless bells and whistles (like tablet holders and TV screens).