剣道の中段の構えにおける左足先方向が足底力と正面打撃動作に及ぼす影響について
1984 年 16 巻 2 号 p. 18-26
詳細
1984 年 16 巻 2 号 p. 18-26
The purpose of this study is to investigate the influence of the left foot outward angle in Chudan-no-kamae on the Shomen-uchi.
A force platform was used together with 16 mm cine camera to investigate synchronously the mechanics of take-off motion during the Shornen-uchi in Kendo.
The records of the force components of foot pressure on the floor of the male Kendo players were obtained at the take-off motion during Shomen-uchi. Subsequently, the records were taken with the body movements shown in 16 mm film.
The subjects for this study were 9 male students of the Tsukuba University,20 to 23 years of age,12 to 15 years of experience and 3 to 4 dan degree.
The results obtained are as follows:
1. The leftward and the backward components of foot force increase with the change of the left foot angle (from 0° to 50°). The tendency above mentioned is clearly observed over 30° and especially at 50°.
2. The larger the left foot angle at Chudan-no-kamae is, the more the maximum magnitude of leftward force (Fx) increases. On the contrary, both of the backward (Fy) and vertical (Fz) forces during take-off motion at Shomen-uchi decrease.
3. A larger and sharper peak in the force curve of the backward and vertical components is observed at the angle under 20° and especially usual foot position.
4. The angle of forward inclination of body (∠f) decreases gradually with the increase of the left foot angle. The angle of trunk (∠a) decreases as the result of an inadequate left foot action, which causes delay of the posture recovering after striking motion.
