Because the ski solicits hard all the muscle groups (thighs, abs, back and arms) but also the joints (knees and ankles). To avoid injuries, it is therefore important to work on muscle building before leaving as well as sheathing and balance. Practiced at altitude where oxygen is scarce, skiing is also very demanding at the cardio-respiratory level. Do not forget to work also endurance so as not to be breathless after the first descent.
Today, many websites or gyms offer specific training to prepare for winter sports. So we have no more excuses to get our hands in the pockets and walk away in the plaster.