Why the 400m is the Ultimate Race - stack
43.03 – The Fastest 400m in History – Žiga P. Škraba
The 400 Is a Sprint
UT signee Lauren Lewis impressing on and off the track amid record-breaking senior season
400 Meter Training from Supertraining
Fastest High School 400m In 2020 - YouTube
Niklas Klei Sets World Record for Fastest 400-Meter Dash While Wearing Crocs | 2022 Crocs 400-Meters
2019 World Athletics Championships – Men's 400 metres - Wikipedia
6 Phases of A Perfect 400m Race - stack
18-year-old matches world's 6th-fastest 400m to win relay - Canadian Running Magazine
Wayde van Niekerk: Five things to know about the Olympic 400m champion and world record holder
Texas signee Lauren Lewis of Prosper breaks state record in 400 meters at area meet
Karsten Warholm Sets World Record in 400-Meter Hurdles - The New York Times
400 metres - Wikipedia
How to Run a Faster Indoor 400 Meter Dash - YouTube
Van Niekerk betters 400m world record
Michael Norman (sprinter) - Wikipedia
How van Niekerk broke the 400m world record
Two Titles, School Record Highlight Final Day Of SEC T&F Meet - University of Georgia Athletics
Norman breaks world indoor 400m record at NCAA Indoor Championships | REPORT | World Athletics
Wayde van Niekerk wins gold, sets world record in 400m - Sports Illustrated
