Athletics at the 2008 Summer Olympics – Men's 400 metres : ウィキペディア英語版
Athletics at the 2008 Summer Olympics – Men's 400 metres
The Men's 400 metres at the 2008 Summer Olympics took place on 18–21 August at the Beijing National Stadium. The qualifying standards were 45.55 s (A standard) and 45.95 s (B standard). ==Records== Prior to this competition, the existing world and Olympic records were as follows: No new world or Olympic records were set for this event.