Today's dolphin swimming developed in the 1930s when swimmers started breaststroke swimming with their arms moving forward simultaneously over the surface of the water. This arm action was combined with a conventional sternum strike. The resulting combination was and is still used today in the German Swimming Association (DSV) as butterfly swimming. In 1965 the technique of dolphin swimming was shown for the first time in swimming. The simultaneous up and down movement of the legs is similar to a dolphin flapping of the fins.
Arm movement
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The swimmer dips into the water with both hands at the same time. The extended arms become continuous underwater outward forward (under the body) moves. The trunk is raised slightly. When the arms (underwater) reach shoulder height (double shoulder width), they become turned inwards. The printing phase begins. The elbows are bent more and more, the fingertips point diagonally downwards. The hands approach below the shoulder axis. This is followed by another Outward movement of the arms in the direction Thigh. The body moves over the arms. The movement of the arms thus resembles a long drawn one S. During this phase, the head breaks through the waterline looking downwards. The Elbow and then the hands leave the water. Then the explosive, semicircular one begins Arm swing phase to the starting position. The trunk moves forward downward. Pass the arms Shoulders, the head dips into the water.
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During an arm pull cycle, two whip-like leg movements occur. The first leg kick occurs with the Dipping hands, and the second with the end of the Outward action of the arms. They resemble the fin movement of dolphins. The coordination between thighs, lower legs and feet is important here. The movements must follow one another in time so that a rhythmic movement takes place. The movement must be relaxed and relaxed.
The decisive factor in dolphin swimming is the undulating movement of the swimmer. (Arms, head, torso, thighs, lower legs and feet are moved one after the other on a wave-like path).
A detailed description of the movement can be found under Description of movement dolphin swimming