Most telemark skiers worry the most about injuring their knees while earning their turns.
This injury is commonly found when the skier catches the inner edge of a lightly weighted or non-weighted ski. This can occur when the uphill ski, early in the initiation of a turn, in not weighted properly or is flat on the snow instead of being used to carve the early part of the turn. Solitary ACL tears usually occur when the skier falls back and off to the side of their uphill ski that is rear weighted. With this fall, the skier's hips drop below and behind the knee, pulling the femur back as the knee flexes. This is shown on the animation on below.