American football is a dangerous sport where players are injured and paralyzed for several weeks.
There are many dangerous sports in the world, but to say American football is one of the most dangerous is not an exaggeration. Any professional player must accept career risks from injuries caused by the game.
Football players often have to play with a broken arm hanging from his shoulder, broken fingers, toes, or ankle or shoulder. Just one injury can affect your health for the rest of your life. Sometimes an injury is deep in the brain that only 15-20 years after it develops and causes the player to be completely paralyzed or possibly premature death.
American Football is the most popular and popular team sport. American football is closely related to Canadian football but has some differences in the rules of the game and many other characteristics. In the US, some of the main forms of football are high school football, college football and professional football, which are essentially the same but differ in some points in the rules of the game.
The football field is 100 yards (approximately 91 m) long, divided into 20 sections of 5 yards (4.5 m), marked by 19 long white lines across the field. Between the long lines are four rows of short lines, each row of 4 bars separated by 1 yard (approximately 1 m). The last section at each end of the court is called the end-zone, 10 yards (9.1 m) long, usually diagonal red stripe separated by a long white line called the goal line. At the end of the restricted area is the end line, followed by goal posts.
The golf pole is planted in the center of the course, 10 feet high, on the north side a 18 feet 6 inch long crossbar, at the ends of the crossbar are two vertical bars 30 feet high. In total, the entire football field is 120 yards (109 meters) long and 53 1/3 yards (48 m) across. From a penalty line, every 10 yards, the court will be marked with a number of 10, 20, 30, 40 until the center of the field is 50. After this level, the court is reversed 40, 30, 20 and 10 for to the restricted area of the other party.