A collaborative research group led by Associate Professor Takeda Takeda of the Faculty of Sport and Health Sciences, Juntendo University and Professor Hideki Takagi of the University of Tsukuba's Physical Education has demonstrated that if you jump in a swimming crawl or flutter after kicking a pool wall, it will slow down significantly. bottom.
In swimming, the speed is higher when kicking the wall in the turn motion of diving into the pool or turning back than when actually performing the swimming method motion.In order to start swimming smoothly while maintaining the high speed at this time, butterfly kicks and butterflies have been used in the crawl start.
In actual competitions, in addition to athletes who start swimming only with a butterfly kick, there are also athletes who start swimming with additional butterflies after the butterfly kick.Although the propulsion power of the butterfly foot is inferior to that of the butterfly kick, there has been a debate that it may be possible to swim smoothly by adding the butterfly foot after the butterfly kick because the butterfly foot is used for the swimming method itself in the crawl. It has been done.
Therefore, in order to clarify the effect of the butterfly foot after the butterfly kick in the crawl, the research group targeted eight male swimmers who have participated in national competition-scale competitions and started swimming after kicking the pool wall. The conditions were set to two conditions, (8) "butterfly kick only" and (2) "add a butterfly foot after the butterfly kick", and the speed changes between the conditions were compared.
As a result, under the condition of "after butterfly kick + flutter foot", it becomes clear that the speed of the fluttering phase is slowed down, and when the flutter foot is used for swimming after diving or kicking a wall where a high speed is obtained. , It was clearly shown that it would be a disadvantage.
Since this is a result that has a great impact on performance for swimmers at the level of participating in national competitions, it is widely known that "fluttering should not be used" for crawl swimming. Expect.However, the results of this research have been clarified from the data of athletes with a high level of skill, and it is desirable to apply it to the beginner-intermediate and junior generations according to the training stage and practice plan.
In the future, the research group will focus on the characteristics of swimming in which a high speed (initial speed) is obtained in advance by diving or kicking a wall, and will work on discovering, evaluating, and elucidating the mechanism of swimming technology that maintains the initial speed, as well as swimming methods and methods. Advance research so that it can contribute to the improvement of teaching methods.
