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Cheerleading is a physical activity, sometimes a competitive sport, using organized routines, usually ranging from one to three minutes, which contain the components of tumbling, dance, jumps, cheers, and stunting to direct spectators of events to cheer on sports teams at games or to participate in competitions. The person involved is called a cheerleader. Cheerleading originated in the United States, and remains a predominantly American activity, with an estimated 1...

Yoga (Sanskrit, Pāli: योग yóga) refers to traditional physical and mental disciplines that originated in India. The word is associated with meditative practices in Hinduism, Buddhism and Jainism. Within Hinduism, it refers to one of the six orthodox (āstika) schools of Hindu philosophy, and to the goal towards which that school directs its practices. In Jainism, yoga is the sum total of all activities — mental, verbal and physical...

Underwater diving is the practice of going underwater, either with breathing apparatus (scuba diving and surface supplied diving) or by breath-holding (free-diving). Recreational diving is a popular activity (also called sports diving or subaquatics). Professional diving (commercial diving or diving for financial gain) takes a range of diving activities to the underwater work site. Levels of training and types of equipment and breathing gases used differ between types of diving...

Boxing, also called pugilism, is a combat sport in which two people fight each other using their fists for competition. Boxing is typically supervised by a referee engaged in during a series of one- to three-minute intervals called rounds, and boxers generally of similar weight...

Volleyball is an Olympic team sport in which two teams of six players are separated by a net. Each team tries to score points by grounding a ball on the other team's court under organized rules. The complete rules are extensive. But simply, play proceeds as follows: A player on one of the teams begins a 'rally' by serving the ball (tossing or releasing it and then hitting it with a hand or arm), from behind the back boundary line of the court, over the net, and into the receiving team's court...