Influence to the height of vertical jump used a new way of jumping method
垂直跳における新たな跳躍方法を用いたことによる跳躍高への影響

Noboru Furukawa, Iwami Nakamura, Masato Sagawa, Masataka Sawada, Tadashi Kobayasi
The Japan Journal of Coaching Studies  
Although the Standard Jump (S. J) is the most popular vertical jumping method, we don , t think that it is the most effective method for jumping vertical heights because of the following two reasons. Firstly, the S. J is generally thought of as a series of exercises, from the crouch to the jump, is an upward linear movement. Secondly, when performers crouch, they seem to have difficulty in stretching their legs swiftly because of the enormous reaction which is caused by a series of multiple
more » ... le actions at the same time: bringing the arms down, bending the upper torso forward, and flexing the lower body simultaneously. We therefore have devised a new jump called the Furukawa Jump (F. J): At first a person brings his/her arms down and at the same time bends the torso down while slightly leaning backwards with the thigh muscles extended. Then he/she extends the arms upward and flexes the legs, at the same time. In this article, we report the results of our measurement sampling of three different student groups who were tested with both vertical jumping methods (Standard Jump or Furukawa Jump) to see which is more effective. The student groups consisted of 34 male students and 35 female students from Hokkaido University of Education as well as 37 female students from Iwamizawa Nursing College. The results are as followed; 1) The ratio of the subjects (three different students groups), where the F. J jumped higher than the S. J, was 65.7%, 67%, 73% respectively and two-thirds of the subjects jumped higher by the F. J in any group. 2) The F. J exceeded statistically 1% level in any group, compared to the S. J jump in average score. 3) The rate of F. J jump, gained from the S. J, was 2.4% , 2.4% , 2.5% respectively.
doi:10.24776/jcoaching.17.1_141 fatcat:tzerhwlkwjfmtekkqyai5faoii