Football is the name given to a number of different team sports. The most popular of these worldwide is Association Football, which is called soccer in several countries.

The object of soccer games is to kick, run with, or pass the ball across the goal line between posts and under a crossbar.

In all football games, the winning team is the one that has the most goals when a specified length of time has elapsed.

While it is widely believed that the word football, or "foot ball", originated in reference to the action of a foot kicking a ball, there is a rival explanation, which has it that football originally referred to a variety of games in medieval Europe, which were played on foot.

Football can be quite a high intensity sport, especially in competitive forms. The game usually requires a moderate to high fitness level.