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, showcasing their speed and endurance. Runners start from a staggered position to ensure fairness, as the track curves. The race is typically run in a single lane, and athletes must maintain their lane throughout the race. The 400-meter dash is known for its combination of speed and strategy, as runners must pace themselves to avoid fatigue before the finish line.