The 400 meter dash is a sprinting event in track and field that covers a distance of 400 meters, equivalent to one lap around a standard outdoor track. Athletes compete to complete the distance in the shortest time possible, combining speed and endurance. Runners start in staggered positions to ensure a fair race, as the track curves. The event is part of major competitions, including the Olympics and World Championships, and is known for its intense pace and strategic pacing, as athletes must manage their energy throughout the race.