The Olympic 400m men freestyle record is 3:40.59 by Ian Thrope.
Olympic Record 400m Individual Medley 2008 Beijing Olympics Michael Phelps (USA) August 9, 2008 Time: 4:03.84
43.18 by Michael Johnson
43.18 seconds set by Michael Johnson in 1999 is still the current world record
It's Usain Bolt!
Usain Bolt (JAM) in 9.63s and Olympic record.
He was an Olympic 400m gold medallist and world record holder who refused to compete on Sundays.
2:06:32 by Samuel Wanjiru of Kenya, a new Olympic record.
World: Jonathan Edwards (18.29 meters). Olympic: Kenny Harrison (18.09 meters).
Michael Johnson of the USA with a time of 43.49.