1/ Improve your enduration by skiing
A day of skiing involves switching between intense physical efforts and moments of relaxation as well as the constant adaptation of the body to the altitude, the lack of oxygen and the outdoor conditions. Skiing allows you to strengthen your general endurance.
In addition, altitude naturally boosts the body by forcing it to build more red blood cells to compensate for the lack of oxygen. This is why athletes who need endurance, like football players, do training courses at altitude.