Volleyball Asia, as well as in the United States. Beach volleyball, a variation of the game played on sand and with only two players per team, became a FIVB-endorsed variation in 1987 and was added to the Olympic program at the 1996 Summer Olympics. Volleyball is also a sport at the Paralympics managed by the World Organization Volleyball for Disabled. Nudists were early adopters of the game with regular organized play in clubs as early as the late 1920s. By the 1960s, a volleyball court had become standard in almost all nudist/naturist clubs. Volleyball has been part of the Summer Olympics
Beach volleyball (overhand passes which accidentally cross over the net are an exception). These differences between the rules of indoor volleyball and beach volleyball strongly affect tactics and techniques. Beach volleyball players use hand signals to indicate to their partners the type of block they either intend to make (if they are the designated blocker) or that they want their partner to make (if they are the designated defender). Block signals are important so that both the blocker and defender know which area of the court is their responsibility to cover. Block signals are made behind the back to hide them from