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http://grupodestudoslutas.blogspot.com

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São Paulo, São Paulo, Brazil
Professor da EEFE-USP; Praticante e Pesquisador de Judô; Preparador físico de atletas de modalidades esportivas de combate.

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quinta-feira, 30 de agosto de 2012

Impacto nos chutes de TKD


 2012 Aug 28. [Epub ahead of print]

Effects of Olympic-style taekwondo kicks on an instrumented head-form and resultant injury measures.

Source

Department of Physical Education, Yonsei University, Seoul, Republic of Korea.

Abstract

OBJECTIVE:

The objective of this study was to assess the effect of taekwondo kicks and peak foot velocity (FVEL) on resultant head linear acceleration (RLA), head injury criterion (HIC15) and head velocity (HVEL).

METHODS:

Each subject (n=12) randomly performed five repetitions of the turning kick (TK), clench axe kick (CA), front leg axe kick, jump back kick (JB) and jump spinning hook kick (JH) at the average standing head height for competitors in their weight division. A Hybrid II Crash Test Dummy head was fitted with a protective taekwondo helmet and instrumented with a triaxial accelerometer and fixed to a height-adjustable frame. Resultant head linear acceleration, HVEL, FVEL data were captured and processed using Qualysis Track Manager.

RESULTS:

The TK (130.11±51.67 g) produced a higher RLA than the CA (54.95±20.08 g, p<0 .001=".001" 300.19="300.19" a="a" and="and" d="1.84)" difference="difference" es="es" hic15="hic15" higher="higher" hvel="hvel" in="in" jb="jb" jh="jh" m="m" no="no" of="of" p="p" s="s" than="than" that="that" the="the" there="there" tk="tk" vs="vs" was="was">

CONCLUSIONS:

The TK is of concern because it is the most common technique and cause of concussion in taekwondo. Future studies should aim to understand rotational accelerations of the head.