Both the Olympic record and world record were set in 1992 by the US ' Kevin Young , with a time of 52.4 seconds , while the women 's Olympic record was set by Jamaica 's Melanie Walker in 2008 , with a time of 52.64 seconds , and the women 's world record was set in 2019 by the US ' Dalilah Muhammad , with a time of 52.16 seconds .