二次元的抽象化による教科内容の追求 : 跳び箱運動におけるかかえ込み跳びを例に

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  • Clarification of subject content by two-dimensional abstraction : an example of tuck jumping practicein vaulting box exercise

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The purpose of this study is to examine the methods to clarify subject content by two-dimensional abstraction through the analysis of tuck jumps in vaulting box exercise as a starting point of the study of apparatus gymnastics. If the action/reaction of forces is captured by vector diagrams that show the composition and decomposition of forces as a perspective of two-dimensional abstraction, tuck jumps on a mat can be understood as a jump without running on a vaulting box and a suitable teaching material for analyzing and synthesizing the quality of exercise. There were following results and problems of this practical research. It was shown that the learning by tuck jumps on a mat in "rhythmic words" that capture the motion process as a whole has a transfer effect as rhythm words on the vaulting box. The study also showed that the use of hand- and foot-shaped cards enhanced the quality of group learning, and the use of small-step materials increased motivation for learning skills. In addition, trunk fixation, which enables the action/reaction of force, was found to be linked to short exhalations, and this was presented as a perspective of the clarification of subject content.

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