American football American football American football, referred to as football in the United States and Canada and also known as gridiron, is a team sport played by two teams of eleven players on a rectangular field with goalposts at each end. The offense, which is the team controlling the oval-shaped football, attempts to advance down the field by running with or passing the ball, while the defense, which is the team without control of the ball, aims to stop the offense's advance and aims to take control of the ball for themselves. The offense must advance at least ten yards in four
Steroid use in American football approximately 20 percent of the players on a football team to test on a specific day. Anabolic steroids and other performance-enhancing drugs are also used throughout high school football. Steroid use at this level of play doubled from 1991 to 2003, with results of a survey showing that about 6 percent of players out of the 15,000 surveyed had admitted to using some type of anabolic steroid or performance-enhancing drug at one point in their playing time. Other data shows that only 4 percent of high schools have some form of drug testing program in place for their football teams.