The men's 400 world record moves rarely, but it does move dramatically
4 × 400 metres relay - Wikipedia
Femke Bol smashes athletics' oldest world record. What could be next?
Wayde van Niekerk smashes Michael Johnson's record to claim 400m gold | Rio 2016 | The Guardian
Femke Bol: Dutch star sets second 400m indoor world record in two weeks | CNN
Sydney McLaughlin-Levrone wins the 400 in near-record time - Los Angeles Times
43.03 – The Fastest 400m in History – Žiga P. Škraba
Wayde van Niekerk: The race for my 400m world record
Karsten Warholm destroys 400 meter hurdles world record in Olympic final - Sports Illustrated
Wayde van Niekerk: South African smashes 400-meter world record to take gold | CNN
Two Americans Broke the World Record in the 400 Hurdles. Only One Could Win Gold. - WSJ
Femke Bol breaks her own 400m world record at indoor worlds | AP News
Vaughan teenager sets world indoor 400m record
Canadian teen Morales Williams unfazed by world-record nullification, has high hopes for Olympics | CBC Sports
Sydney McLaughlin-Levrone eyes Marita Koch's 400-meter world record
Michael Johnson Sevilla 1999: Men's 400m world record
Femke Bol sets new indoor women's 400m world record with 49.26s - CGTN
Van Niekerk COVID-19 test a "false positive", according to manager
400 metres - Wikipedia
Sydney McLaughlin Breaks The World Record in the 400m Hurdles - Women's Running
We've All Been Waiting For This... || The 400 Meter World Record
43.03 – The Fastest 400m in History – Žiga P. Škraba
Sydney McLaughlin-Levrone takes world lead in 400 meters
Van Niekerk smashes world record to grab Olympic 400m glory - Olympic News
How van Niekerk broke the 400m world record
Tokyo Olympics: Norway's Karsten Warholm smashes world record in race for the ages to win 400m hurdle race - India Today
400 METER WORLD RECORD || WHO WILL BREAK IT?
