Bi Fin races using CMAS homologated fins were held. Sporting appeal and training Appeal The main appeal of finswimming is reported by some as being the speed that a swimmer can reach. The world record for the men's 50 m freestyle (long course) in sports swimming (see World records in swimming), is 20.91 seconds (by César Cielo of Brazil). In finswimming it is 13.70 seconds (for 50 m apnoea by Pavel Kabanov of Russia) (see World records in finswimming). This is a 50% increase in speed over sports swimming. One of the great appeals of finswimming is that finswimmers do not need to be good sports swimmers. Indeed, there is some evidence that top flight sports swimmers may make poorer finswimmers than well-trained finswimmers (see below). Training Unlike most sports swimming training programmes, finswimming training tends to be far more specific and more like systems used for track running in athletics. In addition, finswimming training tends to have more dry-side work, including a huge amount of core stability (as core strength), plyometrics and weight training. It has been recorded that sports swimmers tend to approach finswimming with preconceptions on technique, which can limit their success. Governing body The governing body is the CMAS Finswimming Commission. Its role includes the upgrading of the rules of competition when required, keeping of records for CMAS championships, the World Games and these of national federations where these match or exceed records achieved at international level, and the maintenance of the CMAS World Ranking which is a listing of the best performing senior and junior men and women from both the most recent Finswimming World Championships and the rounds of the World Cup. It also assists the CMAS Board of Directors and others organising competitions organised under the auspices of CMAS. As of June 2015, national federations in the following countries and territories have affiliated with the Commission: Algeria, Argentina, Armenia, Austria, Australia, Belgium, Belarus, Canada, Cameroon, Cape Verde, Chile, Colombia, Cuba, China, Croatia, Cyprus, Czech Republic, Denmark, Ecuador, Egypt, Estonia, Finland, France, Germany, Great Britain, Greece, Hungary, Hong Kong, Indonesia, Italy, Japan, Jordan, Kazakhstan, Kenya, Korea, Kuwait, Kyrgyz Republic, Lebanon, Luxembourg, Libya, Mexico, Marianas, Montenegro, Netherlands, Palestine, Peru, Philippines, San Marino, Saudi Arabia, Serbia, Singapore, Slovakia, Slovenia, Spain, Switzerland, Syria, Russia, Tunisia, Turkey, Taiwan, Thailand, United Arab Emirates, United States of America, Venezuela and Vietnam. Competition at international level CMAS competitions As of 2007,