著者

小林 一敏 高山 伸也 島野 敬四郎

出版者

中京大学

雑誌

中京大学体育学論叢 (ISSN:02887339)

巻号頁・発行日

vol.41, no.1, pp.11-17, 1999-12-27

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The purpose of this study was to clarify the influence of dual motion in the performance of various sports. Motions that feature mutual dynamic operations are known as dual motion. Such motions may be divided into two types of movement which, although they may appear to share the same motions, may actually arise from quite different levels of mental concentration. For the purpose of this study, the body was taken as divided into two sections, M1 and M2. Each of these sections was the subject of mental concentration in producing the power of a movement (M(A)) and maintaining the "shape" of the movement (M(O)). Thus, [M1(A), M2(O)]and[M1(O), M2(A)]served to indicate these two types of movement (dual motion). Two experiments on dual motion were conducted. 1) The motion of twisting the upper half of the body to the left was performed on a turntable. 2) A kick with the instep was performed without a football. EMGs were recorded and movements were filmed during these experiments. The result obtained in this study may be summarized as follow : The divided motions[M1(A), M2(O)]and[M1(O), M2(A)]were demonstrated not only by the differing level of mental concentration but also by differing muscular activity in dual motion.