Competitors are divided into three main categories: sit-ski, standing and visually impaired. Each category is then divided into classes based on functional ability resulting from the degree and type of disability. Each class is scored based on a percentage factor relative to the strongest class in the category. The competitor’s actual race time is adjusted, and the fastest adjusted time is the winner.
Visually impaired:
A guide skis ahead of the competitor alerting them vocally or over a radio of all corners, inclines, declines or other course alterations. In the biathlon events, an auditory system is used to guide the competitor toward the target.
Sit-ski:
This category includes athletes with lower-extremity disabilities. In Alpine skiing, a mono-ski is used. In Nordic skiing, a sledge is used. A sledge is a specially designed chair attached to a pair of skis.
Standing:
Most competitors have a limb disability, such as an amputation below or above the knee or elbow.