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Because football is a high-contact sport requiring a balance between offense and defense, many rules exist that regulate equality, safety, contact, and actions of players on each team. It is very difficult to always avoid violating these rules without giving up too much of an advantage.
The first American football game was played on November 6, 1869, between two college teams, Rutgers and Princeton, using rules based on the rules of soccer at the time. A set of rule changes drawn up from 1880 onward by Walter Camp , the "Father of American Football", established the snap , the line of scrimmage , eleven-player teams, and the ...
A standard football game consists of four 15-minute quarters (12-minute quarters in high-school football and often shorter at lower levels, usually one minute per grade [e.g. 9-minute quarters for freshman games]), [6] with a 12-minute half-time intermission (30 minutes in the Super Bowl) after the second quarter in the NFL (college halftimes are 20 minutes; in high school the interval is 15 ...
In football, the formation describes how the players in a team are positioned on the field. Many variations are possible on both sides of the ball, depending on the strategy being employed. On offense, the formation must include at least seven players on the line of scrimmage , including a center to start the play by snapping the ball.
The first American football game was played on November 6, 1869, between two college teams, Rutgers and Princeton, using rules based on the rules of soccer at the time. A set of rule changes drawn up from 1880 onward by Walter Camp , the "Father of American Football", established the snap , the line of scrimmage , eleven-player teams, and the ...
The early history of American football can be traced to early versions of rugby football and association football.Both games have their origin in varieties of football played in Britain in the mid–19th century, in which a football is kicked at a goal or run over a line, which in turn were based on the varieties of English public school football games.
The first American football game was played on November 6, 1869, between two college teams, Rutgers and Princeton, using rules based on the rules of soccer at the time. A set of rule changes drawn up from 1880 onward by Walter Camp , the "Father of American Football", established the snap , the line of scrimmage , eleven-player teams, and the ...
The standard defensive formations in use at most levels of American football are the result of decades of experimentation, trial and error, along with rule changes in the 1950s that eliminated the one-platoon system and gave greater prominence to lighter, faster linebackers (prior to the 1950s, most defensive formations were mirror images of ...