1. Race walkers must always keep at least one foot in contact with the ground.
2. From the moment of landing to the vertical position, the front leg must always be straight and the knee joint cannot be bent.
There are 6 ~ 9 full-time race walking referees to supervise the athletes. According to the rules, they can't use any equipment to help them judge, and they can only rely on their own eyes to judge whether an athlete commits a foul. When the race walking referee sees the signs that the race walking athletes' actions violate the race walking technology, he should give a yellow card warning and report to the referee after the race.
Extended data:
Basic requirements of race walking technology:
1, the stride is natural, the stride width is wide, the frequency is fast, the fluctuation of the trajectory of the body center of gravity is small, the moving speed is fast, and the effectiveness is high.
2, natural and coordinated movements, strong sense of rhythm, easy and labor-saving, and good economy.
3. Both feet can't leave the ground at the same time.
The speed of ordinary walking is about five kilometers per hour, while the speed of race walking is much faster. Even walking at a medium speed is more than twice as fast as ordinary walking. According to the rules of race walking, the supporting legs must be straight and supported by both feet. Before the heel of the swinging leg touches the ground, the toe of the back kick should not leave the ground, so that it can be supported by both feet and not fly. This is the fundamental difference between walking and running.
The speed of race walking depends on the step frequency and step size. Ordinary race walking takes about 100 to 120 steps per minute, which can reach 180 to 200 steps, and excellent race walkers take more than 200 steps per minute. The stride length of ordinary race walking is generally 70 to 80 cm, the stride length of race walking can reach 90 to 1 10 cm, and the stride length of tall athletes is about 120 cm.
Baidu Encyclopedia-Race Walking