Football is a game that involves two teams. Each team has 11 players, one for offense and one for defense. The offense moves the ball down the field to score a touchdown by running with it or throwing it to a teammate. The defense tries to stop the offense and force the team to turn over the ball.
To start a play, the offensive team lines up on an imaginary line in front of the other team, called the line of scrimmage. The center, or snapper, gives the ball to the quarterback, who can hand it off to a fullback or running back, throw it to a wide receiver, or run with it. The center and the other members of the offensive line block players from the opposing team to protect the quarterback and give other teammates time to gain yards.
The defense tries to prevent the offensive team from scoring by tackling any player carrying the ball or receiving a pass. They also try to intercept passes. A play ends when a player touches the ground or if the referee blows the whistle. A team can also kick a field goal to get extra points.
In addition to the physical benefits, playing football improves brain function. The constant movement of the legs and arms improves flexibility, agility, coordination, and reaction time. Playing football also stimulates the production of endorphins, or happiness hormones, which helps relieve stress and anxiety.
Besides running, football involves many other types of physical activity. The game requires a great deal of jumping, twisting, and turning. It builds leg strength and endurance. Players also learn to watch their opponents closely and make decisions quickly. This type of mental sharpness is useful in daily life.
A person can burn 500 to 700 calories in an hour of football. The sport promotes weight loss and reduces body fat. It also increases heart muscle and bone density. The high level of exercise is good for the cardiovascular system and can help prevent high blood pressure and high cholesterol. It can also strengthen bones and decrease the risk of osteoporosis.
The game has a complicated set of rules. To win, a team must have possession of the ball in its own end zone. The team can then run or throw the ball into the opponent’s end zone to score a touchdown. The other way to score a touchdown is by kicking the ball through the goal posts for two points. The defensive team can also score points by tackling the ball carrier or intercepting a pass. The team with the most points wins. If neither team scores a touchdown, the game goes into overtime. In overtime, the team with the ball starts the first drive of the extra period. The other team then gets the ball for the second half of the game. During overtime, each team has four chances to move the ball 10 or more yards. This is called “4th and 10.” If they don’t move the ball, they must kick it away.