The 400 metres, or 400-meter dash, is a sprint event in track and field competitions. It has been featured in the athletics programme at the Summer Olympics since 1896 for men and since 1964 for women. On a standard outdoor running track, it is one lap around the track. Runners start in staggered positions and race in separate lanes for the entire course. In many countries, athletes previously competed in the 440-yard dash (402.336 m)—which is a quarter of a mile and was referred to as the 'quarter-mile'—instead of the 400 m (437.445 yards), though this distance is now obsolete.
These are the official results of the Women's Javelin Throw event at the 1991 World Championships in Tokyo, Japan. There were a total of 31 participating athletes, with the final held on Sunday September 1, 1991. All results were made with a rough surfaced javelin.
The women's 10,000 metres event featured at the 1991 World Championships in Tokyo, Japan. There were a total of 49 participating athletes, with two qualifying heats and the final being held on 30 August 1991.
These are the official results of the Men's 400 metres event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total of 46 participating athletes, with six qualifying heats and the final held on Thursday August 29, 1991.
These are the official results of the Women's 100 metres event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total number of 59 participating athletes, with eight qualifying heats and the final held on August 27, 1991.
These are the official results of the Women's 200 metres event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total number of 38 participating athletes, with five qualifying heats and the final held on Friday August 30, 1991.
These are the official results of the Women's 800 metres event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total of 36 participating athletes, with five qualifying heats and the final held on Monday August 26, 1991.
These are the official results of the Women's 1500 metres event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total number of 42 participating athletes, with three qualifying heats and the final held on Saturday August 31, 1991.
These are the official results of the Women's 3.000 metres event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total number of 40 participating athletes, with three qualifying heats and the final held on Monday August 26, 1991.
These are the official results of the Women's 100 metres hurdles event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total number of 33 participating athletes, with two semi-finals and five qualifying heats and the final held on Friday August 30, 1991.
These are the official results of the Women's 400 metres Hurdles event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total number of 33 participating athletes, with five qualifying heats, two semi-finals and the final held on Thursday August 29, 1991.
These are the official results of the Men's 400 metres Hurdles event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total number of 36 participating athletes, with five qualifying heats, two semi-finals and the final held on Tuesday August 27, 1991.
These are the official results of the Women's Discus Throw event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total of 31 participating athletes, with two qualifying groups and the final held on Saturday August 31, 1991.
These are the official results of the Men's 4x400 metres event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total number of sixteen participating nations, with three qualifying heats and the final held on Sunday September 1, 1991. The final was won by Great Britain in what was, at the time, the fourth fastest time in history. Going into the meeting, the USA 4 × 400 m team hadn't lost at a major championships in over 7 years. Britain, by contrast, hadn't won a gold medal in the event since the 1936 Berlin Olympics.
These are the official results of the Women's 4x100 metres event at the 1991 IAAF World Championships in Tokyo, Japan. Their final was held on Sunday September 1, 1991.
These are the official results of the Women's 4 × 400 metres event at the 1991 IAAF World Championships in Tokyo, Japan. Their final was held on Sunday September 1, 1991.
These are the official results of the women's 400 metres event at the 1992 Summer Olympics in Barcelona, Spain. There were a total number of 41 participating athletes, with six qualifying heats. The finals were held on July 25.
These are the official results of the Men's 400 metres event at the 1993 IAAF World Championships in Stuttgart, Germany. There were a total number of 43 participating athletes, with six qualifying heats and the final held on Tuesday 1993-08-17.
These are the official results of the Women's 400 metres event at the 1993 IAAF World Championships in Stuttgart, Germany. There were a total of 37 participating athletes, with five qualifying heats and the final held on Tuesday 1993-08-17.
These are the official results of the Women's 4x400 metres event at the 1993 IAAF World Championships in Stuttgart, Germany. Their final was held on Sunday 1993-08-22.
