Rules and Regulations
- The runners cannot leave or alter their lanes. Their act of changing lanes could bring disqualification for them.
- If a sprinter unintentionally knocks down the hurdles on his way to the finishing line, it is not an offence. However, if his act is deliberate, he will attract disqualification.
- Width and height of each hurdle is specified by the International Association of Athletics Federations or the IAAF. The organization also specified metal and wood that should be used to make the hurdles.
- The hurdles should be easily adjustable. In different events, hurdles of various heights have to be used. Therefore, their height needs to be adjusted for various events.
- Obstructing a competitor's path is strictly prohibited. Any athlete indulging in such an act will attract instant disqualification. In such a scenario, a re-run can be ordered by the referee.
- If an athlete steps out of the track, he stands disqualified.
- If an athlete fails to reach the finishing line, he gets no credit.
- Only IAAF approved time measurement devices should be used for measuring the time.
Athletes from the United States of America or the USA have always been dominating among the 400 meter hurdle among men.
Some top performers among the athletes in 400 meter hurdle for men have been John Akii-Bua, David Hemery, Rex Cawley, Charles Moore, Andre Phillips, Edwin Moses, Glenn Ashby Davis, Volker Beck, Charles Bacon, Harry Hillman, John Tewksbury, Samuel Matete, Stephane Diagana, Fabrizio Mori, Roy Cochran, Glenn Hardin, Bob Tisdall, David Burghlay, Morgan Taylor, Frank Loomis, Felix Sanchez, Angelo Taylor, Derrick Adkins, Kevin Young, Bershawn Jackson and John Norton.