In fact, knee injuries can be particularly severe. At a minimum, outshape skiers can expect to be sore from the unaccustomed exertion. Getting in shape for the ski slopes involves working on your cardiovascular fitness and flexibility in addition to strengthening muscles and ligaments. Cardiovascular fitness takes time, so you should begin your workouts well before heading for the hills. Doctors also suggest stretching exercises, pushups to strengthen arm muscles and jumping rope to strengthen legs.
Stair climbing does double duty because it strengthens legs and improves cardiovascular function.
While you're out skiing, beware of other health hazards. Dress warmly enough to avoid hypothermia. Dressing in layers is a good idea because you can remove layers as you warm up due to exertion. Remember that much of your body heat is lost through your head, so wear a hat. Another danger is frostbite.