To what extent is it appropriate to pump up football?

FIFA stipulates that outdoor football is inflated with .8Bar air pressure. Generally, standing on the hard ground, the ball is lifted horizontally to make it fall freely, and the rebound height is 2/3 or a little more than the horizontal lift height.

The specific rules about the ball in the football match are as follows:

1. The ball used in the game is the property of the association or club to which the venue belongs, and should be handed over to the referee at the end of the game;

2. The International Council decides the materials for ball making at any time, and any permitted materials shall be approved by the International Council;

3. According to the rules approved by the International Council, the equal weight of the ball is: 14 to 16 ounces equals 396 to 453 grams;

4. If the ball breaks or leaks during the game, the game should be stopped immediately, and the game should be resumed by dropping the ball with a new ball at the place where the original ball broke, unless the ball was in the goal area at that time, in which case, the game should be resumed by dropping the ball on the goal area line nearest to the place where the ball was located and parallel to the goal line when the game was stopped;

5. If the ball leaks in the dead ball, the new ball shall be used according to the corresponding referee, and shall be exchanged when the game becomes a dead ball;

6. Failure to do so will be treated as no substitute.