THE world record run of 36.84 seconds that was set in the Men’s 4x100m final by the Jamaican foursome anchored by double sprint champion Usain Bolt at the London Olympic Games in August has been ratified by the International Associa-tions of Athletics Federations (IAAF).

In their December edition of their online magazine, the world’s governing body for the sport ratified the time established by the crack quartet of Nesta Carter, Michael Frater, Yohan Blake and Bolt.

It was one of four senior world records and one Junior world record set at the XXX staging of the quadrennial sporting extravaganza in London to be confirmed yesterday.

The new time surpassed the 37.04 seconds set by another Jamaican team a year earlier at the IAAF World Championships held in Daegu, South Korea.

It was the third time in four years that a Jamaican team was breaking the Men’s 4x100m world record after the same team comprising Carter, Frater, Blake and Bolt clocked an amazing 37.04 seconds in Daegu, breaking the 37.10 seconds set by another Jamaican team, anchored by Asafa Powell, at the 2008 Olympic Games held in Beijing, China.

Bolt also chalked up a new Olympic record of 9.58 seconds in the Men’s 100m while retaining his 200m title in 19.32 seconds.

The other senior world records that were set at the Olympic Games were the Men’s 800m, Women’s 4x100m relay and the Women’s 20k race walk.

Kenya’s David Rudisha broke his own two-year-old mark of 1 minute, 41.01 seconds in the 800m with an astounding 1 minute, 40.91 seconds.

In that same race, Botswana’s 18-year-old star Nijel Amos smashed the World Junior mark, running 1 minute 41.73 seconds for third place to beat the old record of 1 minute 42.73 seconds by a full second. The previous record was held by Sudan’s Abubaker Kaki and set in June 2008.

The American Women’s 4x100m relay team of Tiana Madison, Alyson Felix, Bianca Knight and Carmelita Jeter also broke a world record, setting 40.82 seconds to shatter the 27-year-old mark of 41.37 set in 1985 by an East German quartet in Australia.

Jamaica finished second in that race, clocking a national record of 41.41 seconds with the team of 100m gold medallist Shelly-Ann Fraser-Pryce, Sherone Simpson, Veronica Campbell Brown and Kerron Stewart breaking the old mark of 41.70 seconds set in Daegu a year earlier.

Russia’s Elena Lashmanova set the other world record in London in the 20K walk in one hour, 25 minutes and 02 seconds.