The purpose of this study was to investigate characteristics of pushing power using a pushing bar (Dosukoi-bar) which was developed to train pushing power in Judo. The subjects were 2 experienced people for using Dosukoi-bar (the experienced group) and 8 inexperienced people (the control group). The experienced group was comprised of 2 elite judo athletes while the control group was comprised of 5 university judo athletes (3 women and 2 men) and 3 ordinary students. We measured pushing power from a Standing posture using a FITROdyne (S&C co.). Ground reaction forces (GRF) were measured using a Force Plate (Kistler co.). Kinematic data of the inclination of angle of the lower limbs and the extension angle of the hip joint were also measured using a Frame-DIAS (DKH co.). We compared the experienced group with the control group in average pushing power per body weight, average GRF, the angle of kicked at the plate, and kinematic data. The data were 3.9 + 0.26 Watt/kg for the experienced group and 4.9±0.67 Watt/kg for the control group. In pushing power per body weight, both groups did not show significant difference. The forward GRF were 432.8+24.82 N for the experienced group and 347.7 + 30.77 N for the control group. The forward GRF for the experienced group was greater than the control group. The vertical GRF were 177.7 + 12.74 N for the experienced group and 214.1 + 27.14N for the control group. The vertical GRF for the experienced group was less than the control group. The angle kicked at the plate was significantly lower for the experienced group (23.QbO.00° ) compared to the control group (31.6 + 3.38°). The inclination angle of the lower limbs during pushing was significantly lower for the experienced group compared to the control group. The data for beginning or end of pushing were 55.0 + 2.97", 49.6 + 0.35 for the experienced group, 68.4 + 5.13°, 64.2+6.26° for the control group, respectively. The way to push while using a lower inclination angle for the lower limbs helped to position the hips forward. It seemed that subjects of extending the hip joint were efücient at pushing by using a kinetic chain to lead the power from the lower limbs to the arms.
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