Towards the end of the 20th century, skaters started to specialize and it became rare that a skater was able to dominate both the short and the long distances. Perhaps the last skater able to do so was Eric Heiden, who won all five distances at the 1980 Winter Olympics. As a consequence of this specialization, the difference between the Olympic Games and the regular championships, and the popularity of both the Speed skating World Cup and Single Distance Championships held nationally in several countries, the International Skating Union decided to organise the World Single Distance Championships.