400 metres hurdles to 400 metres, or one lap of the stadium, and the number of hurdles was reduced to ten. The official height of the hurdles was set to 91.4 cm (3 feet) for men and 76.20 cm (2 ft, 6 inches) for women. The hurdles were now placed on the course with a run-up to the first hurdle of 45 metres, a distance between the hurdles of 35 metres each, and a home stretch from the last hurdle to the finish line of 40 metres. The first documented 400 m hurdles race for women took place in 1971. The International Association
Athletics at the 1968 Summer Olympics – Men's 110 metres hurdles were as follows: Heat 1 Heat 2 Heat 3 Heat 4 Heat 5 Heat 1 Heat 2 Athletics at the 1968 Summer Olympics – Men's 110 metres hurdles The Men's 110 metres hurdles competition at the 1968 Summer Olympics in Mexico City, Mexico. The event was held at the University Olympic Stadium on October 16–17. The Men's 110m Hurdles competition consisted of heats (Round 1), Semifinals and a Final. The three fastest competitors from each race in the heats qualified for the Semifinals along with the fastest overall competitor not already qualified. The four fastest runners from each of the