The men's 400 world record moves rarely, but it does move dramatically
Has any Olympic runner ever medaled in the 100m/200m/and 400 m? - Quora
Van Niekerk betters 400m world record
Karsten Warholm smashes 400m hurdles world record, wins gold in Tokyo - Canadian Running Magazine
Sydney McLaughlin breaks her own 400-meter hurdles world record | CNN
Wayde van Niekerk - Wikipedia
Tokyo Olympics Daily: Karsten Warholm wins greatest ever men's 400m hurdles
400 Metres
The 400 Meter WORLD RECORD || WAYDE VAN NIEKERK'S Plan for 2021 - YouTube
Michael Johnson Sevilla 1999: Men's 400m world record - YouTube
400 Metres
/origin-imgresizer.eurosport.com/2023/08/22/3767967-76649268-2560-1440.jpg "World Athletics Championships live - Hudson-Smith breaks European record in 400m semi-final - Eurosport")
World Athletics Championships live - Hudson-Smith breaks European record in 400m semi-final - Eurosport
Van Niekerk smashes world record to grab Olympic 400m glory - Olympic News
Dutch runner Bol breaks 400m indoor world 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
Record-holder Van Niekerk eases through 400m heat, U.S. trio advance | Reuters
Women's 400m World Record is 48.25 – Žiga P. Škraba
Wayde van Niekerk: Five things to know about the Olympic 400m champion and world record holder
Athletics-Dutch runner Bol smashes her own indoor 400m world record | SaltWire
Wayde van Niekerk smashes Michael Johnson's record to claim 400m gold | Rio 2016 | The Guardian
