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Swimfins, swim fins, diving fins, or flippers are finlike accessories worn on the feet, legs or hands [1] and made from rubber, plastic, carbon fiber or combinations of these materials, to aid movement through the water in water sports activities such as swimming, bodyboarding, bodysurfing, float-tube fishing, kneeboarding, riverboarding, scuba diving, snorkeling, spearfishing, underwater ...
The company offers two dozen models of swim masks and goggles in a wide range of styles, including several models for children. Other products include a range of accessories such as short fins, hand-held paddles and gloves for training, suits and swim caps.
Most commonly, children are expected to be able to swim 200 metres (660 ft)—of which at least 50 metres (160 ft) on their back – after first falling into deep water and getting their head under water. Even though about 95 percent of Swedish school children know how to swim, drowning remains the third most common cause of death among children.
In 1956, Markwitz's three-year-old daughter fell into a goldfish pond and nearly drowned. As a result, Markwitz invented and developed a swimming aid that would be safer for children than swimming rings, which at the time, were made of cork. A lottery win of 253,000 Deutsche Marks gave him a suitable start capital. In 1964, Markwitz developed ...
Species in this genus have developed webbed swimming fin like structures at the front and back of their bodies which enable them to swim up off the surface of the sea floor and to journey as much as 1,000 m (3,300 ft) up into the water column. This is thought to help the animals move to new feeding grounds and avoid predators. [6]
This is a fin stroke for maintaining position and attitude at the surface, particularly while waiting for a pickup or taking a compass bearing. The fins are sculled from side to side using opening and closing motions of the legs, and the ankles rotated as best suited to the thrust needed to turn or hold the diver steady.
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The pectoral fins developed into forelegs (arms in the case of humans) and the pelvic fins developed into hind legs. [50] Much of the genetic machinery that builds a walking limb in a tetrapod is already present in the swimming fin of a fish. [51] [52] Comparison between A) the swimming fin of a lobe-finned fish and B) the walking leg of a ...
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