It's just not possible. Skiing and snowboarding are injurious sports. Beginner snowboarders generally injure the upper extremities, like shoulders and wrists. These sort of upper body injuries occur because novices are constantly catching themselves with their arms when they fall, sustaining injuries to their arms and shoulders. Of course, these types of injuries are different from case to case, and Bozzio said that they can take from as little as three weeks to as long as three months to heal.
Variable training is the key to preventing injuries.
Skiers and snowboarders tend to be too strong in their thighs. This is a contributor to ACL and MCL injuries. Skiing is a quad dominant sport, and the quad is the ACL's enemy. It's important to strengthen posterior muscles, like the hamstring and calf, as well as to stretch often. You need to have a balance.