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Intentionally causing a helmet-to-helmet collision is a penalty in most football leagues, including many high school leagues. [1] Despite its long association with American football, this type of contact is now considered to be dangerous play by league authorities due to the potential of causing serious injury.
The National Federation of State High School Associations (NFHS) establishes the rules of high school American football in the United States. In Canada, high school is governed by Football Canada and most schools use Canadian football rules adapted for the high school game except in British Columbia, which uses the NFHS rules.
Because of these rules, various leagues of American football have enacted strict rules of uniform numbering so officials may more easily judge which players were eligible and which were not at the start of a play. For example, in college football, ineligible players wear numbers 50–79, while eligible receivers wear 1–49 or 80–99. Even ...
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Recognition of such injuries resulted in rule changes in 1976, banning such tackles for high school and college football, after which incidence of these injuries dropped significantly. [2] For example, incidence of quadriplegia decreased from 2.24 and 10.66 per 700 teams in high school and college football in 1976, to 1.30 and 2.66 per 700 ...
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 American football, an unfair act is a foul that can be called when a player or team commits a flagrant and obviously illegal act that has a major impact on the game, and from which, if additional penalties were not enforced, the offending team would gain an advantage. All of the major American football codes include some form of unfair act rule.
A surface in space marked by a structure of two upright posts 18 + 1 ⁄ 2 feet apart (23 + 1 ⁄ 3 in high school football) extending above a horizontal crossbar the top edge of which is ten feet off the ground. The goal is the surface above the bar and between the lines of the inner edges of the posts, extending infinitely upward, centered ...