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Always maintain a streamlined body posture during the intensive swim
Lin Hong said in "Discussion on the Development Trend of Swimming Sports Technology in today's World (Part II)" that the streamlined type is "straight, flat, pointed and tight". Improving the efficiency of paddling and reducing resistance can improve breaststroke performance, and always maintaining a body and part of the streamlined posture during swimming is a manifestation of reducing resistance. At the same time, the role of body position in the whole breaststroke action of the swimming process is very important, most of the current breaststroke athletes use "wave" technology, which is characterized by "chasing waves", that is, athletes try to raise the shoulders as close as possible to the ear, the body pulls forward and upward into the front servant action, try to minimize the up and down floating of the hip joint, so that the trajectory of the body's center of gravity is always maintained in a horizontal position, and maintain the streamlined posture of the body and each part, to ensure the position of the body in the process to reduce resistance.
High elbow wide paddle
The arm stroke of the breaststroke is getting more and more attention, and the outlining technique of modern excellent breaststroke athletes mostly uses high-elbow wide paddling techniques. The purpose of the wide stroke is to lengthen the stroke route, because the stroke stage can produce considerable propulsion; the high elbow action is to use the "handle" principle to ensure the acceleration of the completion of the stroke and stroke effect.
Late time to close the legs
Zheng Minsheng pointed out in the article "Competitive Breaststroke Technology Development Characteristics and Technical Teaching Methods": The traditional coordination time is that the legs have begun to bend their knees and close their legs when they are stroked inward. However, Kitajima and Luo Xuejuan only began to bend their knees and close their legs when their arms began to stretch forward, and the timing of their arms and legs was obviously a beat later than traditional techniques. At the same time, it is also this late beat that drives the hips upwards, forming the basic same leg closing action as the peaceful breaststroke, creating conditions for increasing the leg-stepping strength of the wave breaststroke. Analyzing the timing of this cooperation from the perspective of fluid mechanics, it is believed that it is more conducive to the streamlined type of athletes to maintain the posture of the lower limbs of the body when paddling, as well as to make the arms and the upper part of the body in a high and straight streamlined posture during the leg pedaling, reducing the leg retraction resistance and increasing the leg push force.
Quickly turn your ankle
Hirai, a coach at the time of Kosuke Kitajima, once said that the ankle's rapid ankle rotation technique, as a catalyst for pedaling and sliding to gain kinetic energy, is an important factor in the success of breaststroke.
In the past, there was always a short "pause" between the leg movements, but now the rapid ankle rotation technique is used to make the movement more coherent. When the breaststroke athlete closes the leg to the body, the ankle is bent about 90 ° and ready to step out; the athlete pedals the leg hard and straightens the knee joint; just before the leg kicking action is about to be completed, the athlete's ankle rotates rapidly, and after the rapid rotation of the ankle, the speed reaches the maximum, which improves the initial speed of the next gliding stage, while avoiding the short "pause" phenomenon between the legs, and better ensuring the coherence of the action and the uniformity of the speed.