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American fotball

american fotball

Aufgrund der Härte des American Footballs . Ein weiterer Fall von CTE im American Football, ebenfalls diagnostiziert. American Football ist die beliebteste Sportart in den USA und der Super Bowl ihr alljährlicher Höhepunkt. Aber worum geht es beim Football? Wir erklären die. American Football (englisch für „Amerikanischer Fußball“), oder auch kurz Football, ist eine aus den Vereinigten Staaten stammende Ballsportart und die.

American Fotball Video

American Football - American Football [FULL ALBUM STREAM] Retrieved October 22, A set of rule changes drawn up from onward by Blackjack professional series standard limit casino Campthe "Father of American Football", established the snapeleven-player teams, and the ufc 20 of downs; later rule changes legalized the forward passcreated the neutral zoneand specified Beste Spielothek in Stübig finden size and shape of the football. The player on the receiving team who catches the ball is known as the kickoff returner KR. The touchdown TDworth six points, is the most valuable scoring Beste Spielothek in Engelsberg finden in American football. Wikipedia pages semi-protected against vandalism Use mdy dates from August Good articles Pages with editnotices Use American English from December All Wikipedia articles written in American English Articles containing potentially dated statements Beste Spielothek in Hirschsprung finden All articles containing potentially dated statements Articles containing potentially dated statements from Interlanguage link template link number Spoken articles Articles with hAudio microformats Articles with Curlie links Dfb turnierpläne articles with GND identifiers Wikipedia articles with NDL identifiers. It is often received as "overly aggressive", and defamiliarized 3. liga tabelle aktuell popular culture. An official who sergio ramos suit multiple fouls will throw their hat as a secondary signal. American football leagues exist throughout the world, but the game has yet to achieve the international success american fotball popularity of baseball and png casino. In such a case, a successful attempt is called the two-point conversion [54] and is worth two points. Are you an NFL rookie?

In , both teams in a game between Yale-Princeton used this strategy to maintain their undefeated records. Each team held the ball, gaining no ground, for an entire half, resulting in a 0—0 tie.

This "block game" proved extremely unpopular with the spectators and fans of both teams. A rule change was necessary to prevent this strategy from taking hold, and a reversion to the scrum was considered.

However, Camp successfully proposed a rule in that limited each team to three downs , or tackles, to advance the ball five yards. Failure to advance the ball the required distance within those three downs would result in control of the ball being forfeited to the other team.

This change effectively made American football a separate sport from rugby, and the resulting five-yard lines added to the field to measure distances made it resemble a gridiron in appearance.

Other major rule changes included a reduction of the field size to by Despite these new rules, football remained a violent sport.

Dangerous mass-formations, which involved interlocking interference, like the flying wedge resulted in serious injuries and deaths. The legal forward pass was introduced in , although its impact was initially limited due to the restrictions placed on its use.

Other rule changes introduced that year included the reduction of the time of play from 70 to 60 minutes and the increase of the distance required for a first down from 5 to 10 yards 9.

To reduce infighting and dirty play between teams, the neutral zone was created along the width of the football. This is the first recorded instance of a player being paid to participate in a game of American football , although many athletic clubs in the s offered indirect benefits, such as helping players attain employment, giving out trophies or watches that players could pawn for money, or paying double in expense money.

Despite these extra benefits, the game had a strict sense of amateurism at the time, and direct payment to players was frowned upon, if not outright prohibited.

Over time, professional play became increasingly common, and with it came rising salaries and unpredictable player movement, as well as the illegal payment of college players who were still in school.

The National Football League NFL , a group of professional teams that was originally established in as the American Professional Football Association, aimed to solve these problems.

This new league's stated goals included an end to bidding wars over players, prevention of the use of college players, and abolition of the practice of paying players to leave another team.

The dominant form of football at the time was played at the collegiate level , but the upstart NFL received a boost to its legitimacy in when an NFL team, the Pottsville Maroons , defeated a team of Notre Dame all-stars in an exhibition game.

The game, a 23—17 overtime victory by the Colts, was seen by millions of television viewers and had a major impact on the popularity of the sport.

This, along with the innovations introduced by the new American Football League AFL in the early s, helped football to become the most popular sport in the United States by the mids.

The bidding war for players ended in , when NFL owners approached the AFL regarding a merger, and the two leagues agreed on one that would take full effect in This agreement provided for a common draft that would take place each year, and it instituted an annual World Championship game to be played between the champions of each league.

That game began play at the end of the season. Once the merger was completed, it was no longer a championship game between two leagues, and reverted to the NFL championship game, which came to be known as the Super Bowl.

College football maintained a tradition of postseason bowl games. Each bowl game would be associated with a particular conference, and earning a spot in a bowl game was the reward for winning a conference.

This arrangement was profitable, but it tended to prevent the two top-ranked teams from meeting in a true national championship game, as they would normally be committed to the bowl games of their respective conferences.

Several systems have been used since to determine a national champion of college football. The first was the Bowl Coalition , in place from to A football game is played between two teams of 11 players each.

Individual players in a football game must be designated with a uniform number between 1 and NFL teams are required to number their players by a league-approved numbering system, and any exceptions must be approved by the Commissioner.

The role of the offensive unit is to advance the football down the field with the ultimate goal of scoring a touchdown. The offensive team must line up in a legal formation before they can snap the ball.

An offensive formation is considered illegal if there are more than four players in the backfield or fewer than five players numbered 50—79 on the offensive line.

Interior offensive linemen are not allowed to move until the snap of the ball. The quarterback is the leader of the offense.

Either the quarterback or a coach calls the plays. Quarterbacks typically inform the rest of the offense of the play in the huddle before the team lines up.

The quarterback lines up behind the center to take the snap and then hands the ball off, throws it or runs with it. The primary role of the halfback, also known as the running back or tailback, is to carry the ball on running plays.

Halfbacks may also serve as receivers. Fullbacks tend to be larger than halfbacks and function primarily as blockers, but they are sometimes used as runners in short-yardage situations [47] and are seldom used in passing situations.

The offensive line OL consists of several players whose primary function is to block members of the defensive line from tackling the ball carrier on running plays or sacking the quarterback on passing plays.

The principal receivers are the wide receivers WR and the tight ends TE. The main goal of the wide receiver is to catch passes thrown by the quarterback, [47] but they may also function as decoys or as blockers during running plays.

Tight ends line up outside the tackles and function both as receivers and as blockers. The role of the defense is to prevent the offense from scoring by tackling the ball carrier or by forcing turnovers interceptions or fumbles.

Defensive ends line up on the ends of the line, while defensive tackles line up inside, between the defensive ends.

The primary responsibilities of defensive ends and defensive tackles is to stop running plays on the outside and inside, respectively, to pressure the quarterback on passing plays, and to occupy the line so that the linebackers can break through.

Linebackers line up behind the defensive line but in front of the defensive backfield. They are divided into two types: Linebackers are the defensive leaders and call the defensive plays.

Their diverse roles include defending the run, pressuring the quarterback, and guarding backs, wide receivers and tight ends in the passing game.

The defensive backfield , often called the secondary, consists of cornerbacks CB and safeties S. Safeties are themselves divided into free safeties FS and strong safeties SS.

Safeties are the last line of defense, and are responsible for stopping deep passing plays as well as running plays. The special teams unit is responsible for all kicking plays.

The special teams unit of the team in control of the ball will try and execute field goal FG attempts, punts and kickoffs , while the opposing team's unit will aim to block or return them.

Three positions are specific to the field goal and PAT point-after-touchdown unit: The long snapper's job is to snap the football to the holder, who will catch and position it for the placekicker.

There is not usually a holder on kickoffs, because the ball is kicked off of a tee; however, a holder may be used in certain situations, such as if wind is preventing the ball from remaining upright on the tee.

The player on the receiving team who catches the ball is known as the kickoff returner KR. The positions specific to punt plays are the punter P , long snapper, upback and gunner.

The long snapper snaps the football directly to the punter, who then drops and kicks it before it hits the ground. Gunners line up split outside the line and race down the field, aiming to tackle the punt returner PR — the player that catches the punt.

Upbacks line up a short distance behind the line of scrimmage, providing additional protection to the punter. In American football, the winner is the team that has scored the most points at the end of the game.

There are multiple ways to score in a football game. The touchdown TD , worth six points, is the most valuable scoring play in American football.

A touchdown is scored when a live ball is advanced into, caught in, or recovered in the end zone of the opposing team. A PAT is most commonly attempted from the two- or three-yard line, depending on the level of play.

If scored by a placekick or dropkick through the goal posts, it is worth one point, and is typically called the extra point.

In such a case, a successful attempt is called the two-point conversion [54] and is worth two points. For the season, the NFL adopted a rules on PATs that stated during an extra point the placekick must be snapped from the yard line and on extra points if the kick is blocked and the opposing team returns it into the end zone or if during a two-point conversion the ball is fumbled or intercepted and returned to the end zone the opposing team will score two points.

No points are awarded on a failed extra point or two-point conversion attempt, although under a rare set of circumstances it is possible to score a safety, worth one point, if the defense takes the ball back into its own end zone and is downed there.

A field goal FG , worth three points, is scored when the ball is placekicked or dropkicked through the uprights and over the crossbars of the defense's goalposts.

A safety is scored when the ball carrier is tackled in their own end zone. Safeties are worth two points, which are awarded to the defense. Lines marked along the ends and sides of the field are known respectively as the end lines and sidelines , and goal lines are marked 10 yards 9.

Weighted pylons are placed on the inside corner of the intersections of the goal lines and end lines. White markings on the field identify the distance from the end zone.

Inbound lines, or hash marks , are short parallel lines that mark off 1 yard 0. Yard lines , which can run the width of the field, are marked every 5 yards 4.

A one-yard-wide line is placed at each end of the field; this line is marked at the center of the two-yard line in professional play and at the three-yard line in college play.

Numerals that display the distance from the closest goal line in yards are placed on both sides of the field every ten yards.

Goalposts are located at the center of the plane of each of the two end lines. The crossbar of these posts is ten feet 3.

Goal posts are padded at the base, and orange ribbons are normally placed at the tip of each upright. The football itself is an oval ball, similar to the balls used in rugby or Australian rules football.

Football games last for a total of 60 minutes in professional and college play and are divided into two-halves of 30 minutes and four-quarters of 15 minutes.

The visiting team is allowed to call 'heads' or 'tails'; the winner of the toss is allowed to decide between choosing whether to receive or kick off the ball or choosing which goal they want to defend, but they can also defer their choice until the second half.

The losing team, unless the winning team decides to defer, is allowed to choose the option the winning team did not select, and receives the option to receive, kick, or select a goal to defend to begin the second half.

Most teams choose to receive or defer, because choosing to kick the ball to start the game would allow the other team to choose which goal to defend.

Games last longer than their defined length due to play stoppages — the average NFL game lasts slightly over three hours. An operator is responsible for starting, stopping and operating the game clock based on the direction of the appropriate official.

If the play clock expires before the ball has been snapped or free-kicked, a delay of game foul is called on the offense. The play clock is set to 40 seconds in professional and college football and to 25 seconds in high school play or following certain administrative stoppages in the former levels of play.

There are two main ways that the offense can advance the ball: In a typical play, the quarterback calls the play, and the center passes the ball backwards and under their legs to the quarterback in a process known as the snap.

The quarterback then either hands the ball off to a back, throws the ball or runs with it. The play ends when the player with the ball is tackled or goes out of bounds, or a pass hits the ground without a player having caught it.

A forward pass can only be legally attempted if the passer is behind the line of scrimmage. The offense is given a series of four plays, known as downs.

If the offense advances ten or more yards in the four downs, they are awarded a new set of four downs. If they fail to advance ten yards, possession of the football is turned over to the defense.

In most situations, if the offense reaches their fourth down they will punt the ball to the other team, which forces them to begin their drive from further down the field; if they are in field goal range , they might also attempt to score a field goal.

There are two categories of kicks in football: On a kickoff, the ball is placed at the yard line of the kicking team in professional and college play and at the yard line in high school play.

The ball may be drop-kicked or place-kicked. If a place kick is chosen, the ball can be placed on the ground or on a tee, and a holder may be used in either case.

On a safety kick, the kicking team kicks the ball from their own yard line. They can punt, drop-kick or place-kick the ball, but a tee may not be used in professional play.

Any member of the receiving team may catch or advance the ball, and the ball may be recovered by the kicking team once it has gone at least ten yards and has touched the ground or has been touched by any member of the receiving team.

The three types of scrimmage kicks are place kicks, drop kicks, and punts. Only place kicks and drop kicks can score points.

If it is touched or recovered by the kicking team beyond this line, it becomes dead at the spot where it was touched.

This prohibits the defense from blocking into or tackling the receiver, but the play ends as soon as the ball is caught and the ball may not be advanced.

Officials are responsible for enforcing game rules and monitoring the clock. All officials carry a whistle and wear black-and-white striped shirts and black hats except for the referee, whose hat is white.

Each carries a weighted yellow flag that is thrown to the ground to signal that a foul has been called.

An official who spots multiple fouls will throw their hat as a secondary signal. Another set of officials, the chain crew , are responsible for moving the chains.

The chains, consisting of two large sticks with a yard-long chain between them, are used to measure for a first down.

The chain crew stays on the sidelines during the game, but if requested by the officials they will briefly bring the chains on to the field to measure.

A typical chain crew will have at least three people — two members of the chain crew will hold either of the two sticks, while a third will hold the down marker.

The down marker, a large stick with a dial on it, is flipped after each play to indicate the current down, and is typically moved to the approximate spot of the ball.

The chain crew system has been used for over years and is considered to be an accurate measure of distance, rarely subject to criticism from either side.

Football is a full-contact sport, and injuries are relatively common. Most injuries occur during training sessions, particularly ones that involve contact between players.

At a minimum players must wear a football helmet and a set of shoulder pads , but individual leagues may require additional padding such as thigh pads and guards, knee pads, chest protectors, and mouthguards.

The most common types of injuries are strains , sprains , bruises , fractures, dislocations , and concussions. Repeated concussions and possibly sub-concussive head impacts [] can increase a person's risk in later life for CTE chronic traumatic encephalopathy and mental health issues such as dementia , Parkinson's disease , and depression.

A study performed by the VA Boston Healthcare System and Boston University's school of medicine found that tackle football before age 12 was correlated with earlier onset of symptoms of CTE, but not with symptom severity.

More specifically, each year a player played tackle football under age 12 predicted earlier onset of cognitive, behavioral, and mood problems by an average of two and a half years.

College football is the third-most popular sport in the United States, behind professional baseball and professional football.

High school football is the most popular sport in the United States played by boys; over 1. The NFHS is the largest organization for high school football, with member associations in all 50 states as well as the District of Columbia.

USA Football is the governing body for youth and amateur football, [] and Pop Warner Little Scholars is the largest organization for youth football.

Several professional football leagues have been formed as rival leagues to the NFL. An earlier league, the All-America Football Conference , was in play from to Other attempts to start rival leagues have been far less successful.

The World Football League WFL played for two seasons, in and , but faced monetary issues so severe that the league could not pay its players.

In its second and final season the WFL attempted to establish a stable credit rating, but the league disbanded before its second season could be completed.

American football leagues exist throughout the world, but the game has yet to achieve the international success and popularity of baseball and basketball.

The league's championship game is the Eurobowl. All of these countries rank far below the United States, which is dominant at the international level.

Football is not an Olympic sport , but it was a demonstration sport at the Summer Olympics. Large team sizes are an additional difficulty, due to the Olympics' set limit of 10, athletes and coaches.

American football also has the issue of global visibility. Professional football has ranked as the most popular sport in the poll since , when it surpassed baseball for the first time.

In a study, the NCAA estimated there were around 1. American football also plays a significant role in American culture.

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.

Merit is rewarded, not punished. Masculinity is celebrated, not feminized. People of various beliefs and backgrounds — a melting pot, if you will — must unify for a common goal for the team to be successful".

The safety of the sport has also sparked national controversy in American popular culture. It is often received as "overly aggressive", and defamiliarized in popular culture.

Bennet Omalu , a neuropathologist who was the first to discover and publish findings of chronic traumatic encephalopathy CTE.

American football was the second-most popular sport in Mexico in the s, with the game being particularly popular in colleges.

American football is the fifth most popular sport in Mexico and the country has the highest rating of the NFL outside the United States.

Japan was introduced to the sport in by Paul Rusch , a teacher and Christian missionary who helped establish football teams at three universities in Tokyo.

Play was halted during World War II, but began to grow in popularity again after the war. As of [update] , there are more than high school football teams in Japan, with over 15, participants, and over teams play in the Kantoh Collegiate Football Association KCFA.

Europe is a major target for expansion of the game by football organizers. In the United Kingdom in the s, the sport was fairly popular, with the Super Bowl being watched by over 4 million people about 1 out of every 14 Britons.

The sport's popularity faded over the s, coinciding with the establishment of the Premier League.

According to BBC America , there is a "social stigma" surrounding American football in the UK, with many Brits feeling the sport has no right to call itself 'football' due to the small emphasis on kicking.

Super Bowl viewership has also rebounded, with over 4. The sport is played in European countries such as Switzerland, which has American football clubs in every major city, [] and Germany, where the sport has around 45, registered amateur players.

But in these countries American football has not yet reached the same level of popularity it has, for example, in North America.

For the offensive part of the team, a quarterback throws the football to wide receivers while offensive linemen block to protect him from defensive players.

The offensive linemen also block when a running back runs to advance the football. Players on the Defensive line , a linebacker , and defensive backs cornerbacks and American football safeties attempt to tackle the offensive player who carries the football.

Some team members only play during certain times. These players belong to the Special Teams. The kicker can kick the ball to the other team or between the uprights, while the placeholder holds the ball steady.

The kick returner runs the ball down the field in an attempt to score points after catching the ball. A touchdown is achieved when a player has legal possession of the ball and the ball crosses an imaginary vertical plane above the opposing team's goal line.

After a touchdown, the scoring team attempts a try for 1 or 2 points see below. A successful touchdown is signaled by an official extending both arms vertically above the head.

A field goal is scored when the ball is place kicked between the goal posts behind the opponent's end zone. The most common type of kick used is the place kick.

For a place kick, the ball must first be snapped to a placeholder, who holds the ball upright on the ground with his fingertip so that it may be kicked.

Three points are scored if the ball crosses between the two upright posts and above the crossbar and remains over. Immediately following a touchdown, the scoring team can attempt to kick the ball between the goal posts for 1 extra point.

The team can also run or pass the ball into the end zone for 2 points. This is not done very often although it does happen. A safety is scored if a player causes the ball to become dead in his own end zone.

When this happens two points are awarded to the opposing usually defending team. This can happen if a player is either downed or goes out of bounds in the end zone while carrying the ball.

It can also happen if he fumbles the ball, and it goes out of bounds in the end zone. A safety is also awarded to the defensive team if the offensive team commits a foul which is enforced in its own end zone.

Exhibition season better known as Pre-Season is in August. In the exhibition season, the teams get ready for the regular season by having training.

Teams have practices to help the team get better and see who will make the team. All of the teams play 4 games before the regular season starts, and the games do not change what team gets to the post season.

Because of it, teams do not use their best players much, and use the games as more practice. The 32 NFL teams are divided into two conferences: Each of them is divided in four divisions: North, South, West and East.

Each division includes four teams. The season lasts 17 weeks. Each team plays 16 games and has one week off.

This week of rest is called a "bye week". At the end of the regular season, the winners of each division, and the next two best teams in each conference and the best 6 AFC teams play in a tournament.

The event is often treated as a National holiday as many stores close for the event. The day of the event is commonly known nationwide as Super Bowl Sunday.

From Wikipedia, the free encyclopedia. Men playing American football. Retrieved from " https: Views Read Change Change source View history. In other projects Wikimedia Commons.

Der versucht, einen ihm freigeblockten Weg zu laufen und so Raum gutzumachen. Bei Passspielzügen sollen sie den Quarterback durch Druck zu Fehlern zwingen oder gleich sacken. Hierbei versucht die Offense, am Angriffspunkt eine personelle Überlegenheit herbeizuführen. Geht der Ball bereits beim Kickoff ins Seitenaus, über die Endzone hinaus oder signalisiert der Ballfänger einen Fair Catch , so wechselt das Angriffsrecht ohne einen Return. Bei den Bills hätte es jeder junge Quarterback schwer. Mindestens sieben Spieler müssen beim Snap an der Line of Scrimmage stehen. Neben dem Gehirn sind oft auch andere Organe von den Kollisionen betroffen, und es kommt relativ oft zu Verletzungen mit Todesfolge. Der Quarterback oder ein anderer offensiver Spieler versucht, den Ball einem fangberechtigten Spieler der Offense zuzuwerfen, der eine vorher festgelegte Passroute läuft. Nach was suchst du? Football wurde auch in sogenannten Athletic Clubs gespielt. Europäische Landesmeisterschaften im American Football. AFC Münster Mammuts e. Geschichte des American Football. Ansonsten fungiert er überwiegend als Vorblocker für den Halfback und als zusätzlicher Blocker bei Passspielzügen. Quarterback skill training camp will be held at the Alamodome in San Antonio November 12—14, The primary responsibilities of defensive ends and defensive tackles is to stop running plays on the outside and inside, respectively, to pressure the quarterback on passing Beste Spielothek in Geretschlag finden, and to occupy the line so that the linebackers can break through. Retrieved September 14, Retrieved April 7, Retrieved January 12, An Harvard-Yale game played under rugby-style rules was observed by two american fotball Princeton athletes. Find more about American football at Wikipedia's sister projects. The sport is played on a grass or artificial turf field. Professional football has ranked Beste Spielothek in Matzlow-Garwitz finden the most popular sport in the poll sincewhen it surpassed baseball for the first time. A safety is scored when the ball carrier is tackled in their own end zone. In American football, the winner is the team that has scored the most points at the end of the game. Archived from the original on January 15, In other projects Wikimedia Commons Wikinews Wikivoyage. Archived from the original on January 18,

American fotball -

Was steckt hinter der Show? Möglicherweise unterliegen die Inhalte jeweils zusätzlichen Bedingungen. Über die Zeit wurden die Placekicker immer präziser und stärker: Die Offense muss vor dem Snap mindestens eine Sekunde in ihrer Formation verharren. Für gewöhnlich wird ein Field Goal ab 50 Yards Entfernung aber schwierig.

The player on the receiving team who catches the ball is known as the kickoff returner KR. The positions specific to punt plays are the punter P , long snapper, upback and gunner.

The long snapper snaps the football directly to the punter, who then drops and kicks it before it hits the ground. Gunners line up split outside the line and race down the field, aiming to tackle the punt returner PR — the player that catches the punt.

Upbacks line up a short distance behind the line of scrimmage, providing additional protection to the punter. In American football, the winner is the team that has scored the most points at the end of the game.

There are multiple ways to score in a football game. The touchdown TD , worth six points, is the most valuable scoring play in American football.

A touchdown is scored when a live ball is advanced into, caught in, or recovered in the end zone of the opposing team. A PAT is most commonly attempted from the two- or three-yard line, depending on the level of play.

If scored by a placekick or dropkick through the goal posts, it is worth one point, and is typically called the extra point.

In such a case, a successful attempt is called the two-point conversion [54] and is worth two points.

For the season, the NFL adopted a rules on PATs that stated during an extra point the placekick must be snapped from the yard line and on extra points if the kick is blocked and the opposing team returns it into the end zone or if during a two-point conversion the ball is fumbled or intercepted and returned to the end zone the opposing team will score two points.

No points are awarded on a failed extra point or two-point conversion attempt, although under a rare set of circumstances it is possible to score a safety, worth one point, if the defense takes the ball back into its own end zone and is downed there.

A field goal FG , worth three points, is scored when the ball is placekicked or dropkicked through the uprights and over the crossbars of the defense's goalposts.

A safety is scored when the ball carrier is tackled in their own end zone. Safeties are worth two points, which are awarded to the defense.

Lines marked along the ends and sides of the field are known respectively as the end lines and sidelines , and goal lines are marked 10 yards 9.

Weighted pylons are placed on the inside corner of the intersections of the goal lines and end lines. White markings on the field identify the distance from the end zone.

Inbound lines, or hash marks , are short parallel lines that mark off 1 yard 0. Yard lines , which can run the width of the field, are marked every 5 yards 4.

A one-yard-wide line is placed at each end of the field; this line is marked at the center of the two-yard line in professional play and at the three-yard line in college play.

Numerals that display the distance from the closest goal line in yards are placed on both sides of the field every ten yards. Goalposts are located at the center of the plane of each of the two end lines.

The crossbar of these posts is ten feet 3. Goal posts are padded at the base, and orange ribbons are normally placed at the tip of each upright.

The football itself is an oval ball, similar to the balls used in rugby or Australian rules football.

Football games last for a total of 60 minutes in professional and college play and are divided into two-halves of 30 minutes and four-quarters of 15 minutes.

The visiting team is allowed to call 'heads' or 'tails'; the winner of the toss is allowed to decide between choosing whether to receive or kick off the ball or choosing which goal they want to defend, but they can also defer their choice until the second half.

The losing team, unless the winning team decides to defer, is allowed to choose the option the winning team did not select, and receives the option to receive, kick, or select a goal to defend to begin the second half.

Most teams choose to receive or defer, because choosing to kick the ball to start the game would allow the other team to choose which goal to defend.

Games last longer than their defined length due to play stoppages — the average NFL game lasts slightly over three hours.

An operator is responsible for starting, stopping and operating the game clock based on the direction of the appropriate official. If the play clock expires before the ball has been snapped or free-kicked, a delay of game foul is called on the offense.

The play clock is set to 40 seconds in professional and college football and to 25 seconds in high school play or following certain administrative stoppages in the former levels of play.

There are two main ways that the offense can advance the ball: In a typical play, the quarterback calls the play, and the center passes the ball backwards and under their legs to the quarterback in a process known as the snap.

The quarterback then either hands the ball off to a back, throws the ball or runs with it. The play ends when the player with the ball is tackled or goes out of bounds, or a pass hits the ground without a player having caught it.

A forward pass can only be legally attempted if the passer is behind the line of scrimmage. The offense is given a series of four plays, known as downs.

If the offense advances ten or more yards in the four downs, they are awarded a new set of four downs. If they fail to advance ten yards, possession of the football is turned over to the defense.

In most situations, if the offense reaches their fourth down they will punt the ball to the other team, which forces them to begin their drive from further down the field; if they are in field goal range , they might also attempt to score a field goal.

There are two categories of kicks in football: On a kickoff, the ball is placed at the yard line of the kicking team in professional and college play and at the yard line in high school play.

The ball may be drop-kicked or place-kicked. If a place kick is chosen, the ball can be placed on the ground or on a tee, and a holder may be used in either case.

On a safety kick, the kicking team kicks the ball from their own yard line. They can punt, drop-kick or place-kick the ball, but a tee may not be used in professional play.

Any member of the receiving team may catch or advance the ball, and the ball may be recovered by the kicking team once it has gone at least ten yards and has touched the ground or has been touched by any member of the receiving team.

The three types of scrimmage kicks are place kicks, drop kicks, and punts. Only place kicks and drop kicks can score points.

If it is touched or recovered by the kicking team beyond this line, it becomes dead at the spot where it was touched. This prohibits the defense from blocking into or tackling the receiver, but the play ends as soon as the ball is caught and the ball may not be advanced.

Officials are responsible for enforcing game rules and monitoring the clock. All officials carry a whistle and wear black-and-white striped shirts and black hats except for the referee, whose hat is white.

Each carries a weighted yellow flag that is thrown to the ground to signal that a foul has been called.

An official who spots multiple fouls will throw their hat as a secondary signal. Another set of officials, the chain crew , are responsible for moving the chains.

The chains, consisting of two large sticks with a yard-long chain between them, are used to measure for a first down.

The chain crew stays on the sidelines during the game, but if requested by the officials they will briefly bring the chains on to the field to measure.

A typical chain crew will have at least three people — two members of the chain crew will hold either of the two sticks, while a third will hold the down marker.

The down marker, a large stick with a dial on it, is flipped after each play to indicate the current down, and is typically moved to the approximate spot of the ball.

The chain crew system has been used for over years and is considered to be an accurate measure of distance, rarely subject to criticism from either side.

Football is a full-contact sport, and injuries are relatively common. Most injuries occur during training sessions, particularly ones that involve contact between players.

At a minimum players must wear a football helmet and a set of shoulder pads , but individual leagues may require additional padding such as thigh pads and guards, knee pads, chest protectors, and mouthguards.

The most common types of injuries are strains , sprains , bruises , fractures, dislocations , and concussions.

Repeated concussions and possibly sub-concussive head impacts [] can increase a person's risk in later life for CTE chronic traumatic encephalopathy and mental health issues such as dementia , Parkinson's disease , and depression.

A study performed by the VA Boston Healthcare System and Boston University's school of medicine found that tackle football before age 12 was correlated with earlier onset of symptoms of CTE, but not with symptom severity.

More specifically, each year a player played tackle football under age 12 predicted earlier onset of cognitive, behavioral, and mood problems by an average of two and a half years.

College football is the third-most popular sport in the United States, behind professional baseball and professional football.

High school football is the most popular sport in the United States played by boys; over 1. The NFHS is the largest organization for high school football, with member associations in all 50 states as well as the District of Columbia.

USA Football is the governing body for youth and amateur football, [] and Pop Warner Little Scholars is the largest organization for youth football.

Several professional football leagues have been formed as rival leagues to the NFL. An earlier league, the All-America Football Conference , was in play from to Other attempts to start rival leagues have been far less successful.

The World Football League WFL played for two seasons, in and , but faced monetary issues so severe that the league could not pay its players. In its second and final season the WFL attempted to establish a stable credit rating, but the league disbanded before its second season could be completed.

American football leagues exist throughout the world, but the game has yet to achieve the international success and popularity of baseball and basketball.

The league's championship game is the Eurobowl. All of these countries rank far below the United States, which is dominant at the international level.

Football is not an Olympic sport , but it was a demonstration sport at the Summer Olympics. Large team sizes are an additional difficulty, due to the Olympics' set limit of 10, athletes and coaches.

American football also has the issue of global visibility. Professional football has ranked as the most popular sport in the poll since , when it surpassed baseball for the first time.

In a study, the NCAA estimated there were around 1. American football also plays a significant role in American culture.

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.

Merit is rewarded, not punished. Masculinity is celebrated, not feminized. People of various beliefs and backgrounds — a melting pot, if you will — must unify for a common goal for the team to be successful".

The safety of the sport has also sparked national controversy in American popular culture. It is often received as "overly aggressive", and defamiliarized in popular culture.

Bennet Omalu , a neuropathologist who was the first to discover and publish findings of chronic traumatic encephalopathy CTE.

American football was the second-most popular sport in Mexico in the s, with the game being particularly popular in colleges.

American football is the fifth most popular sport in Mexico and the country has the highest rating of the NFL outside the United States.

Japan was introduced to the sport in by Paul Rusch , a teacher and Christian missionary who helped establish football teams at three universities in Tokyo.

Play was halted during World War II, but began to grow in popularity again after the war. As of [update] , there are more than high school football teams in Japan, with over 15, participants, and over teams play in the Kantoh Collegiate Football Association KCFA.

Europe is a major target for expansion of the game by football organizers. In the United Kingdom in the s, the sport was fairly popular, with the Super Bowl being watched by over 4 million people about 1 out of every 14 Britons.

The sport's popularity faded over the s, coinciding with the establishment of the Premier League. According to BBC America , there is a "social stigma" surrounding American football in the UK, with many Brits feeling the sport has no right to call itself 'football' due to the small emphasis on kicking.

Super Bowl viewership has also rebounded, with over 4. The sport is played in European countries such as Switzerland, which has American football clubs in every major city, [] and Germany, where the sport has around 45, registered amateur players.

But in these countries American football has not yet reached the same level of popularity it has, for example, in North America.

Brazil's audience is the 3rd of the world, behind only Mexico and United States. Rumors were that a Pro Bowl edition could be held there.

One of the reasons of that boom in audience is the placekicker of Kansas City Chiefs , Cairo Santos , the first Brazilian player to reach some worldwide success in the sport.

To , a strongest league will get start in June, including 32 teams around the country, in 4 conferences. The recent born team already won his state championship, and for the Brazilian top league already has signed with former NFL's player Nic Harris.

In other countries of South America there was a very important evolution with regard to American Football, since when has begun the practice of this sport in Argentina.

Currently there are three American Football Leagues in that country: In addition there are teams in the formation stage in several provinces, such as in the province of Santa Fe.

Canadian football , the predominant form of football in Canada, is closely related to American football — both sports developed from rugby, and the two sports are considered to be the chief variants of gridiron football.

Punting is illegal, and kickoffs are attempted from the goal line. Large overhead nets deflect forward passes and kicks that hit them, and deflected kicks are live balls that may be recovered by either team.

Like in arena football, teams in indoor football leagues play in arenas, but games are only attended by a small number of fans, and most players are semi-professional athletes.

Indoor football leagues are unstable, with franchises regularly moving from one league to another or merging with other teams, and teams or entire leagues dissolving entirely.

There are several non-contact variants of American football, such as flag football. A game of touch football may require that the player be touched with either one or two hands to be considered down, depending on the rules used.

From Wikipedia, the free encyclopedia. This article is about the American variation of gridiron football. For a broader usage of the name, see American football disambiguation.

Larry Fitzgerald in blue catches a pass while Cortland Finnegan in red plays defense at the Pro Bowl. Team sport ball game.

Football leather prolate spheroid Football helmet Pads shoulder and knee. History of American football.

Official American football , Chain crew , and Penalty gridiron football. American football protective equipment , Concussions in American football , and Chronic traumatic encephalopathy.

American football in the United States. Canadian football , Arena football , and Flag football. American football strategy College football Comparison of American football and rugby union Comparison of American football and rugby league Concussions in American football Fantasy football American Glossary of American football List of American football players List of American football stadiums by capacity List of leagues of American and Canadian football Pro Football Hall of Fame Steroid use in American football.

Retrieved January 14, Retrieved 13 July What's in a Name? Retrieved April 19, Retrieved June 28, American football in coastal Australia". Archived from the original on September 24, Retrieved November 24, Professional Football Researchers Association.

Archived from the original on January 2, National Collegiate Athletic Association. Archived from the original on April 30, Archived from the original PDF on September 28, Retrieved November 25, Archived from the original on January 15, The History of American Football: Its Great Teams, Players, and Coaches.

Pro Football Hall of Fame. Archived from the original on November 16, Retrieved March 19, Retrieved January 30, Retrieved March 20, Archived from the original PDF on October 19, Archived from the original on January 13, Russo January 2, Retrieved January 16, Archived from the original on October 19, Retrieved October 7, Retrieved November 20, Retrieved November 23, Retrieved November 22, The Unsung Heroes of Football".

Retrieved January 12, Players on a Punt Team". Department of Statistical Science. Retrieved October 23, Pittsburgh Steelers quarterback Ben Roethlisberger throws five touchdown passes in his side's dominant win over the Carolina Panthers.

Mark Chapman and guests look back at last week's action and preview the week ahead in the NFL. Alex Gray has gone from missing out on a silver medal at the Rio Olympics to changing sports and playing for the Atlanta Falcons.

Our guide to everything you need to know about American football and how you can get involved in your own 'game day'.

Are you an NFL rookie? If so, watch our guide to the key rules, the player positions and the ultimate aim of the game. How to get into American football — a sport for all shapes and sizes that requires both mental and physical skills.

Mercedes concern over Ferrari pace despite fastest time. England make four changes for final Test.

Oosthuizen closes on Garcia at Nedbank. Holmes tips Muir for Olympic gold. Tables American Football Home.

American Football Top Stories Roethlisberger throws five touchdowns in Steelers win Pittsburgh Steelers quarterback Ben Roethlisberger throws five touchdown passes in his side's dominant win over the Carolina Panthers.

I've made it into NFL plays of the week'.

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Der Quarterback oder ein anderer offensiver Spieler versucht, den Ball einem fangberechtigten Spieler der Offense zuzuwerfen, der eine vorher festgelegte Passroute läuft. Brown durfte sich in Week 5 über seine ersten Catches im Packers-Trikot freuen. Wir zeigen Euch, wie ihr diesen Bestwert erreichen konntet. Das Team um Superstar J. Drew, herzlichen Glückwunsch zu diesem Rekord! Mychal Kendricks von der NFL gesperrt ran. Ebenso gibt es umfangreichen Spielbetrieb im Jugendbereich. Der Helm ist der auffälligste und gleichzeitig bedeutendste Ausrüstungsgegenstand eines jeden American Football-Spielers. Der Australian Football gehört nicht zu dieser Gruppe, sondern ähnelt stark dem Rugby. Am Ende ist es ein extrem knappes und spannendes Spiel. Sollte dann noch keine Entscheidung gefallen sein, werden solange Overtimes angehängt, bis eine Entscheidung herbeigeführt ist. Brown fing bayern juventus tv ersten Pässe in der NFL. Die Top-Performer vom 3. So musste der Passwerfer mindestens fünf Yards hinter der Line of Scrimmage stehen und durfte nicht weiter als 20 Yards werfen. Üblicherweise übergibt er den Ball dann an einen Ballträger Runningback oder wirft ihn zu einem Passempfänger Receiver. Footballhandschuhe verbessern die Geant casino ouvert dimanche des Balles und erleichtern so das Fangen des Balles. Redskins Beste Spielothek in Vollmarshausen finden Saints ran. Die am weitesten reichende Änderung war die Einführung des Vorwärtspasses, während bis zu diesem Zeitpunkt lediglich Laufspielzüge und Rückwärtspässe erlaubt waren. Zwei american fotball Passgeber stehen vor Scherbenhaufen. Das Passspiel wird in drei Kategorien aufgeteilt: Ein Punt kann dabei von der gegnerischen Mannschaft Receiving-Team im Feld gefangen werden und möglichst weit nach vorne getragen werden Punt Return. So tickt der 49ers-Shootingstar Zwei aktive Stars sind dabei.

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