Sport of athletics athletics tracks for ease of measurement, and the 1908 Summer Olympics in London saw the introduction of the 3500-metre and 10-mile walks. Racewalking was briefly dropped from the Olympic programme in 1928, but the men's 50 kilometres race walk has been held at every Olympic Games but one since 1932. The men's 20 kilometres race walk was added to the Olympic athletics schedule in 1956 and the women's event was first held in 1992. The most common events in modern competition are over 10 km, 20 km and 50 km on roads, although women's 3 km and men's 5 km
Athletics at the 1999 All-Africa Games 4 × 400 metres for men and women. South African athletes won all four throwing events for men. Some new women's events were added: pole vault, hammer throw and 10 kilometres road walk. Athletics at the 1999 All-Africa Games The seventh All-Africa Games were held in September 1999 in Johannesburg, South Africa. As the track is at an altitude of 1748 metres all performances are considered to be set at altitude, this is believed to assist events up to 400 metres and in the long jump and triple jump. However, for events beyond 800 metres the thinner air is believed