100 metres at the Olympics 40 in 2000 and reached the Olympic semi-finals four years later. (Ottey is also the most frequent participant having competed in the Olympic 100 m an unrivalled six times from 1984 to 2004). The first women's champion, Betty Robinson in 1928, remains the youngest gold medallist for the event at 16 years old, while a 32-year-old Linford Christie became the oldest 100 m Olympic champion in 1992. Since introduction of testing by the IAAF in the early-20th century, female sprinters may be subject to gender verification. This rule was first formally applied to the 100 m at the 1968 Mexico
Speed skating at the 1956 Winter Olympics – Men's 5000 metres naturally frozen ice. "(**)" The record was set on naturally frozen ice. At first Helmut Kuhnert who skated in the first pair set a new Olympic record with 8:04.3 minutes. In the third pair Wim de Graaff bettered the Olympic record with 8:00.2 minutes. Finally Boris Shilkov set a new Olympic record with 7:48.7 minutes on the way to win the fourth heat and the gold medal. Speed skating at the 1956 Winter Olympics – Men's 5000 metres The 5000 metres speed skating event was part of the speed skating at the 1956 Winter Olympics programme. The competition was held