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
2017 World Championships in Athletics – Women's 3000 metres steeplechase 2017 World Championships in Athletics – Women's 3000 metres steeplechase The women's 3000 metres steeplechase at the 2017 World Championships in Athletics was held at the London Olympic Stadium on 9 and 11 August. Kenya had six entrants in the race, the three normally allowed including the number one runner in 2017 Celliphine Chepteek Chespol, plus defending champion Hyvin Jepkemoi and two expatriates; Winfred Mutile Yavi and world record holder / Olympic champion Ruth Jebet who were running for Bahrain. From the gun in the final Beatrice Chepkoech went to the front. There is a partial lap at the beginning