 Cross @-@ country skiing : Cross @-@ country skiing , also known as Nordic skiing is open to athletes with Cerebral Palsy , amputations , the need for a wheelchair , visual impairment and intellectual impairment . There are fifteen classifications , three for visually impaired athletes , nine for standing athletes and three for seated athletes . The divisions are determined in a similar fashion to alpine skiing with attention given to the athletes ' level of function and need for assistive devices . 
