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
Athletics at the 2015 Pan American Games – Men's 20 kilometres walk back after fighting a strategic battle with the rest of the field until the last lap. Each National Olympic Committee (NOC) was able to enter up to two entrants providing they had met the minimum standard (1.30.00) in the qualifying period (January 1, 2014 to June 28, 2015). Athletics at the 2015 Pan American Games – Men's 20 kilometres walk The men's 20 kilometres walk competition of the athletics events at the 2015 Pan American Games will take place on the 19 of July on a temporary circuit around the Ontario Place West Channel. The defending Pan American Games champion