Sepp Zwicknagl, a pioneer of snow sports for disabled athletes, was a double-leg amputee Austrian skier who experimented skiing using prosthetics. His work helped pioneer technological advances for people with disabilities who wished to participate in winter sports. Advances were slow and it was not until 1974 that the first official world ski competition for physically impaired athletes, featuring downhill and a cross-country skiing, was held. The first Winter Paralympics were held in 1976 at Örnsköldsvik, Sweden from February 21–28. Alpine and Nordic skiing for amputees and visually impaired athletes where the main events but ice sledge racing was included as a demonstration event. There were 198 participating athletes from 16 countries, and it was the first time athletes with impairments other than wheelchair athletes were permitted to compete.