In 2007, British Journal of Sports Medicine reported over 75 million participants worldwide
300 million table tennis players worldwide
Squash has more than 15 million. According to well-placed insiders
Estimated 150 to 200 million Badminton players worldwide
40 million players in the United States and 500 million players worldwide
According to the Chess in the Olympcis Campaign an estimated 605 million people worldwide know how to play chess 285 million play and and 7.5 million are registered players.
More than a billion alltogether:
Volleyball players, football players, basketball players, ++.