The Olympic 400m men freestyle record is 3:40.59 by Ian Thrope.
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∙ 11y agoOlympic Record 400m Individual Medley 2008 Beijing Olympics Michael Phelps (USA) August 9, 2008 Time: 4:03.84
Michael Johnson
19.30
43.18 by Michael Johnson
43.18 seconds set by Michael Johnson in 1999 is still the current world record
It's Usain Bolt!
usian bolt
Usain Bolt (JAM) in 9.63s and Olympic record.