Netball as the number of women participating in sports increased. Basketball was invented in 1891 by James Naismith in the United States. The game was initially played indoors between two teams of nine players, using an association football that was thrown into closed-end peach baskets. Naismith's game spread quickly across the United States and variations of the rules soon emerged. Physical education instructor Senda Berenson developed modified rules for women in 1892; these eventually gave rise to women's basketball. Around this time separate intercollegiate rules were developed for men and women. The various basketball rules converged into a universal set in
James Naismith could help its track athletes to keep in shape and explicitly emphasized to "make it fair for all players and not too rough." In his attempt to think up a new game, Naismith was guided by three main thoughts. Firstly, he analyzed the most popular games of those times (rugby, lacrosse, soccer, football, hockey, and baseball); Naismith noticed the hazards of a ball and concluded that the big soft soccer ball was safest. Secondly, he saw that most physical contact occurred while running with the ball, dribbling or hitting it, so he decided that passing was the only legal option.