Squash is a ball sport played by two (singles) or four players (doubles) in a four-walled court with a small, hollow rubber ball. The players must alternate in striking the ball with their racket and hit the ball onto the playable surfaces of the four walls of the court.
The game was formerly called squash rackets, a reference to the "squashable" soft ball used in the game (compared with the harder ball used in its sister game rackets).
The governing body of Squash, the World Squash Federation (WSF) is recognised by the International Olympic Committee (IOC), but the sport is not part of the Olympic Games, despite a number of applications. Supporters continue to lobby for its incorporation in a future Olympic program.
Badminton is a racquet sport played using racquets to hit a shuttlecock across a net. Although it may be played with larger teams, the most common forms of the game are "singles" (with one player per side) and "doubles" (with two players per side). Badminton is often played as a casual outdoor activity in a yard or on a beach; formal games are played on a rectangular indoor court. Points are scored by striking the shuttlecock with the racquet and landing it within the opposing side's half of the court.
The game developed in British India from the earlier game of battledore and shuttlecock. European play came to be dominated by Denmark but the game has became very popular in Asia, with recent competitions dominated by China. Since 1992, badminton has been a Summer Olympic sport with five events: men's singles, women's singles, men's doubles, women's doubles, and mixed doubles.
Boxing is a combat sport in which two people, usually wearing protective gloves, throw punches at each other for a predetermined set of time in a boxing ring.
Amateur boxing is both an Olympic and Commonwealth Games sport and is a common fixture in most international games—it also has its own World Championships. Boxing is supervised by a referee over a series of one- to three-minute intervals called rounds. The result is decided when an opponent is deemed incapable to continue by a referee, is disqualified for breaking a rule, resigns by throwing in a towel, or is pronounced the winner or loser based on the judges' scorecards at the end of the contest.
Enjoy whatever sport you decide to practice! :)