As of April, 2009:
Florence Griffith-Joyner holds the women's world record in the 200 meter dash with a time of 21.34 seconds set at the 1988 Summer Olympics in Seoul.
For Men the record is 43.49 seconds (9.1975 Meters per second.) This record is held by Micheal Johnson and was set in the 1996 Olympics. For Women the record is 48.25 seconds (8.2091 Meters per second.) This record is held by Marie-Jose Perec and was set in the 1988 Olympics. Hope this helps.
Usain Bolt of Jamaica set the world record at 19.30 in the 2008 Olympics in Beijing China. His time beat Michael Johnson's World and Olympic record from 1996 (19.32). Bolt and Johnson are the only men ever to have been timed (with a legal wind) under 19.60 seconds.
Click on the 'Progression of Men's 400 Meter World Record' link on this page to see who has held the men's world record through time in the 400 meter run.
The current men's world record is held by Michael Johnson, with a time of 43.18 seconds
The current women's world record is held by Marita Koch, with a time of 47.60 seconds
Marita Koch from Germany with a time of 47.60 seconds.
Usain Bolt holds the world record at 9.69 seconds for the 100 meter dash. Usain Bolt holds the world record at 19.30 seconds for the 200 meter dash. Michael Johnson holds the world record at 43.18 seconds for the 400 meter dash. So I would say Usain Bolt.
The men's world record in the 400 meter dash is 43.18 seconds. The men's world record in the 400 meter hurdles is 46.78 seconds. This is a difference of 3.60 seconds. The women's world record in the 400 meter dash is 47.60 seconds. The women's world record in the 400 meter hurdles is 52.34 seconds. This is a difference of 4.74 seconds.
400 Meters - J. T. Scheuerman, Littleton, 46.23, 2006
The men's 400 meter hurdles world record in 1990 was 47.02 seconds set by Edwin Moses of the United States in 1983.
Michael Johnson currently holds the world record for the 400m at 43.18 seconds.
Michael Johnson of the United States is the current 400m record holder. He ran 43.18 on 26 August 1999 in Seville.
Men's: Michael Johnson 43.18 Women's: Marita Koch 47.60
The world record was set in February 2009 for the fastest 400 meter run by a high school student. Sixteen year old, Colton Hyde of Lynnville, completed a 42 second 400 meter dash.