Description
The fins are used especially in activities that have to do with water sports, such as swimming, bodyboarding, drilling, knee surfing, hydrospeed and, of course, diving, a sport for which they are mainly intended.
Divers use fins to move through the water more effectively because human feet provide relatively little thrust, especially when the diver is wearing equipment that increases drag in the water. Long fins and single fins are used by freedivers and competitive swimmers as an impulse method that instead of requiring a certain frequency of movement of the legs (as happens with individual fins for each foot) requires a rhythmic undulation of the body, similar to the one that dolphins and other cetaceans run to get around.
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