Among them, due to the great differences in the competition environment, the marathon has only the best results and no Olympic record. In track events, if there are a large number of participants, the preliminary, semi-finals and finals with 8 participants can be held first, and the final result will be the final ranking result. The track race must run counterclockwise (that is, the left hand is close to the inner ring). The number of passes (or starting position) is determined by drawing lots. The starting device must be used when starting the first stick of lane-divided running and relay running (not allowed in other track events, three starting signals of "in place", "ready" and starting gun are used, and only one password of "in place" is used in some lane-divided running and non-lane running events, and then the starting gun is used. Two fouls at the beginning will disqualify you. If you hit someone or prevent others from running in, you will be disqualified. Athletes who should have run in the swimming lane were not forced to run out of the swimming lane directly by others and received assistance (running with others, providing or guiding) during the competition. Those who commit crimes again after being warned shall be disqualified. The ranking order of each race to the finish line is based on the order in which any part of the athlete's trunk (excluding head, neck, arms, hands, legs and feet) touches the vertical plane in the finish line, and the results are calculated by time.
The circumference of the first track of international track competition is 400 meters, the curve radius is about 36-38 meters, and the radius R=36.5 meters. Known as the standard 400-meter track and field, it has 6-8 runways with a width of 1.22 meters. The runway is paved with plastic surface to increase friction, thus improving the competitive level of athletes.
During the competition, the contestants must start in a squat position and use the starting device, and are not allowed to rush to run; Players are not allowed to cross their own runways and interfere with each other; When there are a large number of athletes, they must be eliminated in groups first, and finally eight people will be selected to participate in the finals.