Physical measurement:
Physical fitness was invented by a doctor of physical education in Denmark. It mainly simulates frequent movements such as acceleration, deceleration, sudden stop and turning in a competition, and tests the state of players when they reach the limit of physical fitness. The specific criteria are as follows: the team members run in two groups with the sound of "beep, beep" within 20 meters, with an interval of 5 seconds, and the sound rhythm is constantly accelerating. The test speed of the team members starts from 8 speed until it is increased to 17 speed. When it reaches the speed of 17, it is close to the physical limit of the players.