during the 1936 Olympic 500–metre race, it was suggested that Ivar Ballangrud's 500-metre time was almost a second too good. Finland won the remaining four gold medals at the 1924 Games, with Clas Thunberg winning 1,500 metres, 5,000 metres, and allround. It was the first and only time an allround Olympic gold medal has been awarded in speed skating. Speed Skating is also a sport in today's Olympics. Norwegian and Finnish skaters won all the gold medals in world championships between the world wars, with Latvians and Austrians visiting the podium in the European Championships. However, North American races were usually conducted pack-style, similar to the marathon races in the Netherlands, but the Olympic races were to be held over the four ISU-approved distances. The ISU approved the suggestion that the speed skating at the 1932 Winter Olympics should be held as pack-style races, and Americans won all four gold medals. Canada won five medals, all silver and bronze, while defending World Champion Clas Thunberg stayed at home, protesting against this form of racing. At the World Championships held immediately after the games, without the American champions, Norwegian racers won all four distances and occupied the three top spots in the allround standings. Norwegians, Swedes, Finns, and Japanese skating leaders protested to the USOC, condemning the manner of competition and expressing the wish that mass-start races were never to be held again at the Olympics. However, the ISU adopted the short track speed skating branch, with mass-start races on shorter tracks, in 1967, arranged international competitions from 1976, and brought them back to the Olympics in 1992. Technical developments Artificial ices entered the long track competitions with the 1960 Winter Olympics, and the competitions in 1956 on Lake Misurina were the last Olympic competitions on natural ice. 1960 also saw the first Winter Olympic competitions for women. Lidia Skoblikova won two gold medals in 1960 and four in 1964. More aerodynamic skating suits were also developed, with Swiss skater Franz Krienbühl (who finished 8th on the Olympic 10,000 m at the age of 46) at the front of development. After a while, national teams took over development of body suits, which are also used in short track skating, though without headcover attached to the suit—short trackers wear helmets instead, as falls are more common in mass-start races. Suits and indoor skating, as well as the clap skate, has helped to