Basketball is a competitive sport invented as a men's game in 1891 by James Naismith in Springfield, Massachusetts but now played on every inhabited continent and by men and women, most often contested by two teams, each comprising five participating players, for whom substitutions may be made. For some teams the substitutions may only consist of a few players and for others they may have anywhere from 7 to 8 subs. The team attempts to advance a spherical ball through a cast-iron basket with attached net and backboard, elevated such that the basket rim isвЂ“in most professional leaguesвЂ“ten feet (3.048 meters) from the surface of the rectangular basketball court, for indoor games usually made of hardwood and for outdoor games usually made of asphalt, on which the sport is played.
Certain disruptive contact, especially that by which an advantage is gained, is penalized (as a personal foul), as is unsportsmanlike conduct (as a technical foul), with disqualification often imposed on players who accumulate a pre-arranged number of fouls in one game. Certain means of ballhandling, such as one's running with the ball while not dribbling (travelling) or one's catching the ball between dribbles (double dribbling) are proscribed and, when committed by a given team, result in the awarding of possession to the opposing team.