progression with monofin or with two fins either on the surface or underwater, by means of the swimmers' muscular force only and without use of any mechanism, not even muscle powered
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For underwater disciplines with breathing euipment, only compressed-air sub-aqua equipment is allowed.
Competition at world and continental level is organised by the Confédération Mondiale des Activités Subaquatiques (CMAS). The sport's first world championship was held in 1976. It also has been featured at the World Games as a trend sport since 1981 and was demonstrated at the 2015 European Games in June 2015.
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