 In his final Jamaican High School Championships in 2003 , he broke both the 200 m and 400 m records with times of 20 @.@ 25 s and 45 @.@ 35 s , respectively . Bolt 's runs were a significant improvement upon the previous records , beating the 200 m best by more than half a second and the 400 m record by almost a second . While Bolt improved upon the 200 time three months later , setting the still standing World youth best at the 2003 Pan American Junior Championships , it remains the No. 2 youth time . The 400 time remains No. 6 on all time youth list , only surpassed once since by future Olympic champion Kirani James . 
