Long-distance running confined area. Early tracks were usually on flattened earth or were simply marked areas of grass. The style of running tracks became refined during the 20th century: the oval running tracks were standardised to 400 metres in distance and cinder tracks were replaced by synthetic all-weather running track of asphalt and rubber from the mid-1960s onwards. It was not until the 1912 Stockholm Olympics that the standard long-distance track events of 5000 metres and 10,000 metres were introduced. Long-distance road running competitions are mainly conducted on courses of paved or tarmac roads, although major events often finish on the track
10,000 metres at the Olympics 10,000 metres at the Olympics The 10,000 metres at the Summer Olympics is the longest track running event held at the multi-sport event. The men's 10,000 m has been present on the Olympic athletics programme since 1912. The women's event was added to the programme over seventy years later, at the 1988 Olympics. It is the most prestigious 10,000 m race at elite level. The competition format is a straight final between around 30 athletes, although prior to 2004 a qualifying round was held. The Olympic records for the event were both set by Ethiopians at the 2008 Beijing Olympics