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A great cormorant swimming. Aquatic locomotion or swimming is biologically propelled motion through a liquid medium. The simplest propulsive systems are composed of cilia and flagella. Swimming has evolved a number of times in a range of organisms including arthropods, fish, molluscs, amphibians, reptiles, birds, and mammals.
Swimming underwater is faster than swimming on the surface. Underwater swimming is not its own category in the Olympics, but in the 1988 Olympics several competitors swam much of the backstroke race underwater. After that, the Olympics created a rule that swimmers are only allowed to stay underwater for the first 10 meters (later changed to 15 ...
Butterfly stroke Overhead shot of a swimmer performing the butterfly stroke Butterfly stroke, shortly before entering the water again; view from behind. The butterfly (shortened to fly [1]) is a swimming stroke swum on the chest, with both arms moving symmetrically, accompanied by the butterfly kick (also known as the "dolphin kick") along with the movement of the hips and chest.
The dolphin kick is named for its resemblance to the motions made by a swimming dolphin. It is typically used in competitive swimming immediately after a swimmer enters the water or after turns. The swimmer performs the kick by moving both legs together, vertically, which sends a wave through the swimmer's body, propelling them forward.
More whales will then blow bubbles while continuing to circle their prey. The size of the net created can range from three to thirty metres (9.8 to 98.4 ft) in diameter. [6] One whale will sound a feeding call, at which point all whales simultaneously swim upwards with mouths open to feed on the trapped fish. [4]
Finning techniques are the skills and methods used by swimmers and underwater divers to propel themselves through the water and to maneuver when wearing swimfins. [1] There are several styles used for propulsion, some of which are more suited to particular swimfin configurations. [ 2 ]
The trudgen is a swimming stroke sometimes known as the racing stroke, or the East Indian stroke. It is named after the English swimmer John Trudgen (1852–1902) [1] and evolved out of sidestroke. [2] One swims mostly upon one side, making an overhand movement, lifting the arms alternately out of the water.
The front crawl or forward crawl, also known as the Australian crawl [1] or American crawl, [2] is a swimming stroke usually regarded as the fastest of the four front primary strokes. [3] As such, the front crawl stroke is almost universally used during a freestyle swimming competition, and hence freestyle is used metonymically for the
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