Canada at the Olympics medals at both the Winter and the Summer Games, with two Summer and four Winter medals. Clara Hughes and Cindy Klassen hold the record for most Olympic medals won by a Canadian of either gender, with six each. Cindy Klassen holds the record for most Winter medals won by a Canadian of either gender, with six. Catriona Le May Doan became the first Canadian to defend their gold medal at the Olympics. She repeated her gold medal in the women's 500m long track speedskating event at the 2002 Salt Lake City Olympics from the 1998 Nagano Olympics. Alexandre Bilodeau became
History of swimming turn, and requiring the head to break the surface every cycle. The 1956 Games in Melbourne also saw the introduction of the flip turn, a sort of tumble turn to faster change directions at the end of the lane. In 1972, another famous swimmer, Mark Spitz, was at the height of his career. During the 1972 Summer Olympics in Munich, Germany, he won seven gold medals. Shortly thereafter in 1973, the first swimming world championship was held in Belgrade, Yugoslavia by the FINA. Breaking the water surface reduces the speed in swimming. The swimmers Daichi Suzuki (Japan) and David Berkoff