Racquetball, invented in the United States by Joe Sobek to accommodate for a lack of indoor sports, is a racquet-and-ball game between 2-4 players. While racquetball used to be played exclusively on indoor courts, the sport has now expanded to indoor and outdoor courts. The first racquetball world championship in the US took place in 1981, and since then the sport has experienced a rapid rise in popularity.
Since its inception, racquetball has been played all over the world. Not only did people find themselves drawn to the sport for its cardiovascular benefits, but squash players in foreign countries noticed lots of similarities between squash and racquetball, making for a seamless transition from one sport to the other.
Official racquetball courts measure 20 feet wide, 20 feet high and 40 feet long. Solid red lines are marked in various places along the court, indicating boundaries that must be obeyed in order to avoid being assessed a penalty. Some of the most important markers include the service line (cannot be crossed while serving the ball), receiving line (where the receiving player must return the serve) and short line (the ball must reach the short line after bouncing off the wall).
The game of racquetball is played one-on-one or between teams of two. In order to score points, a player/team must win a "rally," which refers to the ball being hit off a large front wall until one player/team fails to return it in one bounce or less. When the serving player/team loses a rally, serving is forfeited to the opposition until the team now receiving can win another point.
A complete racquetball session is called a match, which involves a best two-out-three series in which each game is won once a player/team achieves 15 points.