| 摘要 |
A training device for use in the sport of judo has a circular bottom surface curving upwardly, and a top part tapering inwardly and upwardly. The training device consists of an elastic material and it is symmetrical about its axis. In particular, the curvature of the flat part and the resulting line of the tapered top part are adapted to the anatomy of the foot, in particular, to the length of the foot and the shape of the instep. This device simplifies the practice of ASHI-WAZA.
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