In the 100, the hurdles are 84 centimeters (2 feet, 9 inches) high. The initial hurdle is 13 meters from the start line, the final hurdle 10.5 meters from the finish and are hurdles spaced 8.5 meters apart.
In the 400, men’s hurdles are 91.4 centimeters (3 feet) high while women’s measure 76.2 centimeters (2 feet, 6 inches). The first hurdle is 45 meters from the starting line, the final hurdle is 40 meters from the finish and the hurdles are spaced 35 meters apart.
Men's World Records:
American Kevin Young was a respectable high school hurdler but he didn’t receive a major college scholarship. So Young walked on at UCLA and blossomed quickly, winning NCAA 400-meter championships in 1987-88. He later employed an unusual strategy to break the world record with a time of 46.78 at the 1992 Olympics. Whereas top-level hurdlers generally take 13 strides between hurdles in the 400, Young decided to use just 12 on hurdles four and five. He’d noticed previously that he was using shorter, choppy strides at that portion of the event. By reducing his strides to 12, Young took longer strides and gained speed.
Women's World Records:
Yuliya Pechonkina remains a competitive hurdler, though she's battled injuries in recent years. She set the world 400-meter record in 2003 when she won the Russian championships in 52.34, beating American Kim Batten's eight-year-old mark of 52.61.