Race walking at the Olympics the first two editions, the women's event was extended to match the men's 20 km distance from the 2000 Sydney Olympics onwards. Women have never commonly competed internationally over 50 km, thus it has never been proposed as an Olympic event – as of 2012 it remains the only event on the Olympic athletics programme in which men compete, but women do not have an equivalent. The 50 km is also the longest distance race for an Olympic athletics event. The Olympic records in racewalking were all broken at the 2012 London Olympics. In the 20 km walk Chen Ding
2009 World Championships in Athletics – Men's 20 kilometres walk 2009 World Championships in Athletics – Men's 20 kilometres walk The men's 20 kilometres walk event at the 2009 World Championships in Athletics was held throughout the city of Berlin on August 15, beginning and ending at the Brandenburg Gate. With the 2007 champion and 2008 Olympic silver medallist Jefferson Pérez having retired, the reigning Olympic champion Valeriy Borchin was regarded as strong favourite. He had recorded the world-leading time prior to the tournament and had been undefeated that season. The Olympic third and fourth-place finishers, Jared Tallent and Wang Hao, were regarded as the strongest challengers to Borchin. Italians