EFFECTS OF ATTACHING WEIGHT LOAD TO BODY ON “DEASHI” (DASHING FORWARD) POWER IN SUMO WRESTLERS-A simulation study of body fat increase-
1998 Volume 30 Issue 3 Pages 1-9
Details
1998 Volume 30 Issue 3 Pages 1-9
The purpose of this study was to evaluate indirectly the effects of body weight increase by fat growth on “Deashi” (dashing forward) power. For this purpose, we examined the power generated from the “Shikiri” position (crouching position in Sumo wrestling), when weights were attached to the subject's waist. After the measurements of body composition, eight wrestlers (%Fat<25) were selected as subjects. In addition to the power, we measured force and velocity, which are the component elements of power. For the measurements of these three parameters, an inertia wheel (equivalent mass=200kg) was used. The measurements were taken on the five weight load conditions (no load, and 25%,30%,35%, and 40% of the simulated %Fat).
The following results were obtained.
1. The power varied significantly (ANOVA; P < 0.01) among the weight load conditions. Maximum power was observed on the load condition of 35%Fat (simulated %Fat). This value was 30% higher (post-hoc test; P<0.01) than that of the no load condition.
2. Similarly, the difference in force among the weight load conditions was statistically significant (ANOVA; P<0.01). The maximum force, on the load condition of 35%Fat, was 18% higher (post-hoc test; P<0.01) compared with that of the no load condition.
3. However, the difference in velocity among the weight load conditions was not statistically significant.
From these results, it seems probable that the “Deashi” power and force both rise with body weight increase even by fat growth, and that when %Fat is over 35%, however, both the power and force decrease or do not change.
