The Purpose of this study was to examine the maximum magnitude of mechanical stress to shin bone produced by KANIBASAMI. Volunteer subjects were six male college black-belt judo players (174.8±4.07cm,75.5 ± 8.71 kg,1.7±0.82).
The bending stress (BS) on two fiber glass poles, which were regarded as a single human leg, was measured. Strain gauges were put on each of the poles, one at 1/4 shin height (SH), one at 1/2 SH, and one at the center of the ankle joint. Three types (High, Middle, and Low) of KANIBASAMI, which were determined by the heights of the higher legs of the subjects were compared with OSOTOGARI.
The results were as follows
1. The BS of OSOTOGARI was greater than the BS of KANIBASAMI at 1/4 SH and at the ankle. Four of the subjects recorded above 20kg/mm² the breaking BS of the shin bone in KANIBASAMI, but only one of the six subjects recorded above this value in OSOTOGARI.
2. The BS of KANIBASAMI was in High type, Middle type, and Low type order.
3. Four of the subjects recorded above the breaking limit of the shin bone in High type and Middle type of KANIBASAMI.
4. BS appeared increase in proportion to both the height of the higher leg and the distance between the legs.