Who set the women's 400m hurdles world record of 50.37 seconds?

Sydney McLaughlin set the women's 400 metres hurdles world record of 50.37 seconds. She ran that time in the final at the 2024 Paris Olympic Games, lowering the world record she had previously set.

McLaughlin's record-breaking career has repeatedly reshaped the event. She first broke the 52-second barrier in 2021 and the 51-second barrier in 2022. Before Paris, her previous record was 50.65 seconds, set at the 2022 World Championships in Eugene, Oregon.

The event is one complete lap around the track with ten hurdles. Dalilah Muhammad is a frequent source of confusion because she held the world record before McLaughlin and pushed the mark to 51.58 seconds in 2019. McLaughlin later married Andre Levrone and is often listed as Sydney McLaughlin-Levrone, but “Sydney McLaughlin” correctly identifies the athlete who set 50.37.