400m image used in IAAF Disciplines section (Getty Images)

Male

Pos Athlete Mark Country
1 Kirani James 43.74 Grenada GRN
2 LaShawn Merritt 43.92 United States USA
3 Isaac Makwala 44.01 Botswana BOT
4 Deon Lendore 44.36 Trinidad And Tobago TTO
5 Wayde van Niekerk 44.38 South Africa RSA

Female

Pos Athlete Mark Country
1 Francena McCorory 49.48 United States USA
2 Sanya Richards-Ross 49.66 United States USA
3 Courtney Okolo 50.03 United States USA
4 Novlene Williams-Mills 50.05 Jamaica JAM
5 Stephenie Ann McPherson 50.12 Jamaica JAM

Male

Pos Athlete Mark Country
1 Michael Johnson 43.18 United States USA
2 Harry Reynolds 43.29 United States USA
3 Jeremy Wariner 43.45 United States USA
4 Quincy Watts 43.50 United States USA
5 LaShawn Merritt 43.74 United States USA

Female

Pos Athlete Mark Country
1 Marita Koch 47.60 German Dem Rep GDR
2 Jarmila Kratochvílová 47.99 Czechoslovakia TCH
3 Marie-José Pérec 48.25 France FRA
4 Olga Vladykina-Bryzgina 48.27 Ukraine UKR
5 Tatána Kocembová 48.59 Czechoslovakia TCH

400 Metres

How it works

Competitors run once around a 400m track. They start from blocks set in staggered positions and run in lanes.

A reaction time – measured by sensors in the starting pistol and on the blocks – of less than 0.1 is deemed a false start and runners will be recalled, and the responsible athlete disqualified. A runner can also be disqualified if he or she steps out of their designated lane.

History

One of the original events at the Ancient Olympics was the 'diaulos', a race around two marks on a course roughly equivalent to the current 400m.

The 400m for men has been in every Olympic Games since 1896. Women first contested the distance at the 1964 Tokyo Games.

Did you know

When Cathy Freeman won Olympic gold in the 400m at her home Games in Sydney 2000, it drew record TV audiences in Australia of around 7million viewers.

Gold standard

This is arguably the strongest event for American men, having won 20 of the 27 Olympic titles to date. But their female counterparts have won just two Olympic golds.

Icons

Michael Johnson

The first man to win the Olympic 400m twice (and the only man to win the 400m and 200m at the same Games), Johnson is the greatest one-lap runner. The Texan took gold in the Atlanta (1996) and Sydney (2000) Games. He also won four World titles, and in 1999 set a world record - 43.18 - that still stands today.

Marie-Jose Perec

France’s Perec was the first runner of either gender to win Olympic gold twice, crushing the opposition at the 1992 Barcelona and 1996 Atlanta Games – where, like Johnson, she performed a double by snatching 200m glory, too. Long-legged and graceful, she also won two World titles.