American football Wikipedia
Another variant — touch football, simply requires the ball-carrier to be touched to be considered downed. Another variation played at some universities, sprint football, limits the maximum weight of players; as of 2022, the maximum weight allowed is 178 pounds , 81 kg, In 2004, the league was called “America’s fifth major sport” by ESPN The Magazine. The Canadian Football League (CFL) is the major Canadian league and is the second-most popular sporting league in Canada — behind the National Hockey League.
Offensive unit
College football is the third-most popular sport in the United States, behind professional football and professional baseball, respectively. The NFL has the highest average attendance of any sporting league in the world, with an average attendance of 66,960 during the 2011 NFL season. To help mitigate injuries, the NCAA recommends limiting full contact , tackling to the ground, practices, avoiding full contact on consecutive days, and no more than 20 hours of practice per week.
Common elements

The football is snapped directly to the punter by the long snapper, who then kicks it after letting it drop to the ground. Typically (a holder is absent during kickoffs since the ball is launched from a tee; nonetheless), in certain scenarios, such as windy conditions making it difficult for the ball to stay upright, a holder might be utilized. Snapping the football to the holder is the responsibility of the long snapper — who will catch and position it for the kicker on the ground. Interceptions (where a defender catches a pass intended for the offense), and forced fumbles, where the ball is taken from the carrier, are included in turnovers. The defense’s objective is to stop the offense from scoring by tackling the ball carrier or causing turnovers.
Modern era of college football
Sheffield Football Club (founded in 1857 in the English city of Sheffield by Nathaniel Creswick and sports betting in Australia William Prest), was later recognised as the world’s oldest club playing association football. The club forbade tripping but allowed pushing and holding and the picking up of the ball. (here pictured in 1857, the year of its foundation) is the oldest surviving association football club in the world.
The crossbar of these posts is 10 feet , 3.0 m, above the ground, with vertical uprights at the end of the crossbar 18 feet 6 inches (5.64 m) apart for professional and collegiate play, and 23 feet 4 inches (7.11 m) apart for high school play. Numerals that display the distance from the closest goal line in yards are placed on both sides of the field every ten yards. Yard lines, which can run the width of the field, are marked every 5 yards , 4.6 m,.
The day on which the Super Bowl is held is considered a de facto national holiday (and in parts of the country like Texas), the sport has been compared to a religion. From 2007 to 2014, the BUAFL grew from 42 teams and 2,460 participants to 75 teams and over 4,100 people involved. At the international level, Canada, Mexico, and Japan are considered to be second-tier, while Austria, Germany, and France would rank among a third tier. American football leagues exist throughout the world, but the game has yet to achieve the international success and popularity of baseball and basketball. The two leagues merged following the 2023 season, forming a new United Football League (UFL).

These changes meant that working class children had more time for games, including various forms of football. Public schools’ dominance of sports in the UK began to wane after the Factory Act 1850, which significantly increased the recreation time available to working class children. This is sometimes said to be the earliest code of rules for any football game.
In all codes (common skills include passing), tackling, evasion of tackles, catching and kicking. In 1888 (the Football League was founded in England), becoming the first of many professional football associations. The expansion and cultural power of the British Empire allowed these rules of football to spread to areas of British influence outside the directly controlled empire. These various forms of football share, to varying degrees, common origins and are known as “football codes”.
Before the team sets up, quarterbacks usually communicate the play to the rest of the offense within the huddle. Until the ball is snapped, interior offensive linemen must remain stationary. Players from neither team, except the center (C), are permitted to align in or cross the neutral zone until the snap occurs. An offensive formation becomes illegal if it contains more than four players in the backfield or fewer than five players wearing numbers 50–79 on the offensive line. Although most football players are men (women can participate in high school), college, and professional football. Active roster limits differ by league; for instance (the NFL permits a roster of 53 players), while NCAA Division I allows a maximum of 105 players on the roster.
Strains, sprains, bruises, fractures, dislocations, and concussions represent the most frequent types of injuries. For over a century — the chain crew system has accurately measured distance and seldom faces criticism from either team. Typically, a chain crew consists of at least three individuals—two members holding the sticks and a third managing the down marker. To gauge a first down, chains made up of two large sticks connected by a 10-yard-long chain are utilized. Each official carries a weighted yellow flag that is thrown to the ground as a signal for a foul. After a scrimmage kick has occurred — the kicking team may only advance the ball if it is caught or recovered behind the line of scrimmage.