Football running limit number like a kicker or something

What are the requirements for the number of players in different positions in American football
In non professional competitions, there is no very strict requirement, but generally, No. 1-9 is the core member of the secret service team, such as a footballer, and No. 50-79 line forward. Note that No. 50-79 is allowed to receive the ball in any position when attackingFootball rules, to be detailed ~
Everyone, whether you are tall or short, fat or thin, can find a suitable position in the team. For example, No. 1 and No. 3 are usually the strongest people in the team, No. 4 and No. 5 are the highest, and No. 11 and No. 14 are the fastest. Rugby may be the only game in the ball game that requires' no forward passing 'How do you play football
After the kick-off game starts or scores, the first ball is kicked according to the rules. The kick-off rule of rugby is that the kick-off team will kick at the midpoint of the center line at the beginning of each half court. After one side scores, the other side will kick the ball at or behind the midpoint of the center line. The kickoff team must stand behind the ballAbout playing football
Olives are divided into English and American styles. I guess you mean American. I don't know whether you are playing or working. Just play with it. He is tall and heavy and can play as a center. His task is to protect the quarterback. He is required to be large enough to stop the opposite raider, and he does not require high speed. If you have good judgment, you can pass the ball wellCan you explain the rules and methods of football
Rugby players do not wear protective equipment during the game, and basically use the clothes of football players, so rugby is also called soft rugby. Rugby is popular, and about 70 countries and regions have carried out this project. The venue is 160 yards long (1 yard = 0.9144 meters) and 75 yards wideWhat are the rules of American football
American football (American football) is a kind of football. It is the most popular sport in the United States and the first of the four major professional sports in North America. American football originated from English football. After it was introduced into the United States, the rules were changed to adopt the offensive and defensive line to fight for the ball in a round, and there was no movement restrictionFootball position number
In football, the distribution of position and number of people is a particularly important aspect. It is actually a sport similar to football, but more diverse than football. Among them, the number of each position of football is quarterback and kickerFootball rules
The ball is oval in shape and looks like an olive. The ball is 11-11 inches (27.94-29.21 cm) long, 30-31 inches (76.2-78.7 cm) long in longitudinal circumference, 24-25 inches (60.96-64.77 cm) long in transverse circumference, and the ball weighs 13-15 ounces (382.72-425.24 g)Football rules
The rules for judging offside in American football games are as follows: when the ball is placed on the ground, any player who crosses the line for the ball is offside; When a free kick is played, a member of the same team who exceeds the limit line is also offside, and the foul team is sentenced to retreat 1.525 metersDetailed rules of football
American football scores in the form of: 6 points for touchdown with the ball; After reaching the array, kick and shoot, and score 1 point; 3 points will be given if the shot is made during the competition; If the opponent is forced into a dead ball in the opponent's division, it will be counted as a safety score, and 2 points will be obtained. Rules of football match. A kick given to a non foul team after a foul