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The legs perform a flutter kick. Elementary backstroke: Both arms move synchronized (They begin out like an airplane, then go beside the body like a soldier then they run up the sides and back out to an airplane position) with whip kick. Inverted butterfly: Similar to elementary backstroke, but with a dolphin kick. This is often used for training.
This elementary backstroke swim was used in the 1900 and 1908 Olympics. The backcrawl swim supplanted the elementary backstroke swim after 1908 as the competitive back swim and it is now referred to as the backstroke. Another variant is the old style of swimming backstroke, where the arm movement formed a complete circle in a windmill type pattern.
The flutter kick in a front crawl. In swimming strokes such as the front crawl or backstroke, the primary purpose of the flutter kick in beginner and intermediate swimmers is not propulsion but keeping the legs up and in the shadow for the upper body and assisting body rotation for arm strokes.
Flutter kick is suitable for long distances at moderate speeds, and long elastic blades are more efficient for converting power into thrust. Flutter kick is the alternating up and down motion of the legs, either from the hips or as the more restricted movement of the modified flutter kick, and is the most frequently used finning technique. [ 1 ]
Propeller whirl flutter is a special case of flutter involving the aerodynamic and inertial effects of a rotating propeller and the stiffness of the supporting nacelle structure. Dynamic instability can occur involving pitch and yaw degrees of freedom of the propeller and the engine supports leading to an unstable precession of the propeller ...
At the end of the somersault the feet are at the wall, and the swimmer is on his or her back with the hands over the head. The swimmer then pushes off the wall and turns to lie on their stomach. After a brief gliding phase, the swimmer starts with either a flutter kick or a butterfly kick before surfacing no more than 15 m from the wall.
The front crawl is most commonly chosen by swimmers, as this provides the greatest speed. During a race, the competitor circles the arms forward in alternation, kicking the feet up and down (flutter kick). Individual freestyle events can also be swum using one of the officially regulated strokes (breaststroke, butterfly, or backstroke).
Backstroke performances (only) are eligible for backstroke records, as they are performed under normal controlled starting conditions (i.e., reflex latency for the starting gun makes the average split time marginally quicker); for example, Ryan Murphy set the world record for the 100 m backstroke during the first leg of the 4 × 100 m medley ...