Força de reação do solo em diferentes segmentos corporais de judocas na realização de “ukemis” em diferentes tipos de tatames / Ground reaction force proceeding from different corporal segments of the judo athlete in accomplishment of “ukemis” in different types of tatamis

RESUMO

Este estudo de cunho exploratório teve como objetivo medir, avaliar e comparar as forças de reação do solo transmitidas através dos diferentes tipos de tatames ao corpo do judoca. Foram testados sete tatames, seis sintéticos e um de palha, nos quais foram realizadas 210 quedas, sendo 10 quedas em cada segmento corporal (mão, quadril e pé), executadas por dois judocas. Como instrumento de medida utilizou-se uma plataforma de força OR6-5 AMTI. Para a coleta de dados, os tatames eram colocados sobre a plataforma, no qual eram realizadas as quedas. Os sinais foram captados em mV , transformados em N e normalizados pelo peso corporal do judoca. Os resultados demonstraram que as FRS mais altas foram encontradas no segmento corporal quadril. Ao se comparar as FRS, para a mão o tatame “C” foi o que apresentou a maior média e o tatame “E” a menor; no pé o tatame “B” apresentou a maior valor e o tatame “F” a menor. Conclui-se que as forças de impacto foram diferentes entre os tatames e entre os segmentos e tão altos quanto a modalidades esportivas que exigem saltos e provocam impactos verticais.

ABSTRACT

This study of exploratory characteristic had as aim to measure, evaluating and comparing the ground reaction forces transmitted through different types of tatamis at the judo practitioner body. Seven tatamis, synthetic six and one of straw had been tested, in which 210 falls had been carried through being 10 falls in each corporal segment (hand, hip and foot), executed for two judo practitioners. A force plate OR6-5 AMTI was used as measure instrument. For the data collection, the tatamis were placed on the platform, in which were carried through the falls. The signals had been caught in mV and transformed into N and normalized by the corporal weight of judo practitioner. The results had demonstrated that the FRS highest had been found in the corporal segment hip. When comparing the FRS for the hand the tatamis “C” presented the average greater and the tatamis “E” the minor; in foot the tatamis “B” presented the biggest value and tatamis “F” the minor. One concludes that the impact forces had been different between the tatamis and between the segments and so high as the sports modalities that demand jumps and cause vertical impacts.