Faltou estratégia

Depoimento do Leandro Guilheiro sobre os desempenho nos Jogos de Londres
http://revistaepoca.globo.com/Vida-util/noticia/2013/02/leandro-guilheiro-faltou-estrategia.html

Até que enfim um protesto contra as regras novas do judô

Um pouco radical, mas acredito ser importante que alguém se manifeste...
http://www.youtube.com/watch?v=CQhgFPB_7R0

Falando sério: L/AM/MEC e crianças e adolescentes

DISCUSSÃO NA SCIENCE SOBRE BENEFÍCIOS DAS ARTES MARCIAIS PARA CRIANÇAS
Interventions Shown to Aid Executive Function Development in Children 4 to 12 Years Old Science 333, 959 (2011);
Adele Diamond1* and Kathleen Lee1
To be successful takes creativity, flexibility, self-control, and discipline. Central to all those are executive functions, including mentally playing with ideas, giving a considered rather than animpulsive response, and staying focused. Diverse activities have been shown to improve children’s executive functions: computerized training, noncomputerized games, aerobics, martial arts, yoga,mindfulness, and school curricula. All successful programs involve repeated practice and progressively increase the challenge to executive functions. Children with worse executive functions benefit most from these activities; thus, early executive-function training may avert widening
achievement gaps later. To improve executive functions, focusing narrowly on them may not be as effective as also addressing emotional and social development (as do curricula that improve executive functions) and physical development (shown by positive effects of aerobics, martial arts, and yoga).

E AQUI A CRÍTICA DE PESQUISADORES MAIS PRUDENTES
Martial Arts Research: Prudent Skepticism
Martial Arts Research: Weak Evidence
21 OCTOBER 2011 VOL 334 SCIENCE

fica o desafio da condução de um estudo bem controlado sobre os reais benefícios dessas atividades para crianças e adolescentes...

REVISÃO SOBRE OS BENEFÍCIOS PSICOLÓGICOS E SOCIAIS DAS ARTES MARCIAIS ENTRE JOVENS

http://www.jssm.org/vol9/n4/1/v9n4-1pdf.pdf

Journal of Sports Science and Medicine (2010) 9, 528-537
http://www.jssm.org/
Received: 20 May 2010 / Accepted: 06 August 2010 / Published (online): 01 December 2010
The social-psychological outcomes of martial arts practise among youth: A review
Jikkemien Vertonghen and Marc Theeboom Vrije Universiteit Brussel, Belgium

Abstract
Martial arts involvement among the youth has been described in controversial terms. Studies regarding the effects of martial arts practise on youth show contrasting images. While some refer to enhanced personal and social opportunities for those that participate, others warn against increased levels of aggressiveness and antisocial behavior among its participants. The aim of the present review is to provide, firstly, an overview of the major findings of studies concerning the social-psychological outcomes of martial arts practise. Secondly, the limitations of those studies are discussed. From more than 350 papers, collected during a two-year lasting literature study, 27 papers met all criteria to be included in this study. This review revealed that even though a considerable amount of research on socialpsychological outcomes of martial arts practise has been conducted over the years, to date, it has not brought clarity in the
existing duality regarding the possible effects of martial arts involvement. It is proposed that a better understanding can be provided if specific influential factors are taken into account in future research (i.e., participants’ characteristics, type of guidance, social context and structural qualities of the sport)

REVISÃO SOBRE BENEFÍCIOS DA PRÁTICA DO JUDÔ PARA CRIANÇAS
Judo for Children and Adolescents: Benefits of Combat Sports Strength and Conditioning Journal (edição especial de dez de 2011, p.60-63)
David H. Fukuda, MS,1 Jeffrey R. Stout, PhD,1 Patrick M. Burris, BA,2 and Robert S. Fukuda, BS3 
1Metabolic and Body Composition Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, Oklahoma; 2USA Judo, USA Stars Foundation, Moore, Oklahoma; and 3United States Judo Federation, Western Idaho Judo Institute, Fruitland, Idaho
JUDO TRAINING IS AN INTERMITTENT METABOLICALLY DEMANDING ACTIVITY THAT HAS HISTORICALLY BEEN CONNECTED TO PHYSICAL EDUCATION AND DEVELOPMENT. THE HEALTH IMPACT OF PRACTICING THIS OLYMPIC SPORT AND MARTIAL ART HIGHLIGHTS THE BENEFITS OF COMBAT SPORTS FOR CHILDREN AND ADOLESCENTS. VARIOUS PHYSIOLOGICAL IMPROVEMENTS, INCLUDING THOSE IN THE AREAS OF BODY COMPOSITION, STRENGTH, AND ENDURANCE, AS WELL AS ENHANCED COGNITIVE PERFORMANCE AND LIFE SATISFACTION HAVE SHOWN TO RESULT FROM PARTICIPATION IN JUDO BY YOUNG PEOPLE.

http://www.jssm.org/vol9/n4/1/v9n4-1pdf.pdf

www.jssm.org

Judô espacial

IMPORTANTE
NASA declara que o amortecimento de quedas é mais eficiente na Lua. Crianças com medo de cair ou com dificuldade no aprendizado dessas técnicas passarão a aprender as técnicas de ukemi do judô nesse local. Astronautas já estão sendo treinados para transmitir as técnicas. Os candidatos brasileiros para o ensino lunar deverão possuir registro profissional.
A NASA também descobriu que os astronautas que simultaneamente apresentam olhos negros e são canhotos preferem o judô como modalidade esportiva. Em missões em que pelo menos dois astronautas gostarem de judô, a agência considera a possibilidade de alterar o tradicional uniforme branco, entregando um uniforme azul para um deles. Dessa forma, além de facilitar o monitoramento das técnicas aplicadas pela dupla, atenderão a regra da FIJ qto à coloração dos judogis. Aqueles que romperem a pegada com as duas mãos serão enviados em uma missão ao Sol. 
Fonte: site do Sérgio Mallandro : )
P.S.: infelizmente a notícia foi retirada do site horas atrás

Save Olympic Wrestling

Pessoal do wrestling se mobilizando para manter a modalidade nos JO.
Bacana.
http://www.facebook.com/pages/Save-Olympic-Wrestling/140684176096583

Artigo sobre BJJ: vai sair

Asian Journal of Sports Medicine

Physiological and technical-tactical analysis in Brazilian jiu-jitsu competition

Leonardo Vidal Andreato, Emerson Franchini, Solange Marta Franzói de Moraes, Juliana Jacques Pastório, Danilo Fernandes da Silva da Silva, João Victor Del Conti Esteves, Braulio Henrique Magnani Branco, Paulo Vitor da Silva Romero, Fabiana Andrade Machado

Abstract

Purpose: The present study aims at investigating the physiological response and technical-tactical parameters in Brazilian jiu-jitsu competition.

Methods: The study included 35 male Brazilian jiu-jitsu athletes (adult category, body mass: 80.2 ± 13.0 kg), graded from white to brown belt, during combats fought at regional level. Twenty-two fights were analyzed in terms of technique and time structure. Blood glucose, lactate and maximal isometric grip strength were determined before and after the fights. The rate of perceived exertion was also assessed after the fight, using the 6-20 Borg scale. The fights were recorded and the following variables were determined: the exertion/pause ratio and subjective intensity of actions, categorized between low and high intensity.

Results: The results indicated that during Brazilian jiu-jitsu fights, the glycolytic pathway is only moderately activated (lactate before: 4.4 (4.0 – 4.6) mmol/L, after: 10.1 (8.0 – 11.3) mmol/L; glucose before: 112.4 ± 22.3 mg/dL, after: 130.5 ± 31.0 mg/dL). The exertion during the fight resulted in significant reductions in handgrip strength (right hand grip before: 45.9 ± 10.3 kgf, after: 40.1 ± 9.5 kgf; left hand grip before: 44.2 ± 11.1 kgf, after: 37.0 ± 10.2 kgf). The athletes rated the fight as hard: 15 (13 – 15). Effort/pause ratio was 6:1, while high-intensity actions lasted approximately 4 s, resulting in a low/high intensity ratio of 6:1.

Conclusions: It is recommended that coaches direct the training loads to simulate the energy demand imposed by the competitive matches, activating moderately the glycolytic pathway. Moreover, the time structure of combats can be used to prescribe both physical and technical-tactical training.

Key Words: Combat Sports; Martial Arts; jiu-jitsu; Sports; Athletic Performance

http://asjsm.tums.ac.ir/index.php/asjsm/article/view/306/pdf

Modalidades olímpicas para 2020

Comitê Executivo do Comitê Olímpico recomenda as 25 modalidades centrais para os Jogos de 2020. Dentre as modalidades de combate, manutenção do boxe, esgrima, judô e taekwondo.
As lutas (Greco-Romana e Livre) não serão apresentadas como centrais entre as 25; disputarão com baseball/softball, karate, esportes com patins, escalada, squash, wakeboarding e wushu por uma posição.
Detalhes no link abaixo:
http://www.olympic.org/news/ioc-executive-board-recommends-25-core-sports-for-2020-games/190772

Simpósio sobre TKD

The 4^th International Symposium

for Taekwondo Studies

Strengthening Youth Education through Taekwondo

July 16-17, 2013

Puebla, Mexico

Important Dates

April 15, 2013	Abstract Submission
March 30, 2013	Early Registration
July 16-17, 2013	Symposium Dates

Organizing Partners

The 4^th International Symposium for Taekwondo Studies will be organized by the World Taekwondo Federation (WTF), and International Association of Taekwondo Research (IATR).

Research Field

Papers will include studies of Sports Science related to Taekwondo (TKD) such as Sports Physiology, Biomechanics, Sports Medicine, Philosophy/Pedagogy of TKD, Sports Sociology/Sports Psychology, and Sports Marketing.

Registration / Submission

Abstract submissions should be emailed to Dr. Jongkook Song by the 15^th of April, 2013 atjksong@khu.ac.kr

Revendo os clássicos para entender o presente

Saeki (1994) The conflict between Tradition and Modernization in a Sport Organization: A Sociological Study of Issues Surrounding the Organizational Reformation of the all Japan Judo FederationInternational Review for Sociology of Sport,
"The direct reason for the AJSJF to secede from the AJJF was a reaction against the tight control of the AJJF during the 1st International Student Judo Tournament - The Shoriki Cup. As indicated by the name of the tournament, the tournament was held in commemoration of Matsutaro Shoriki, chairman of the Congressional Judo Federation and CEO of one of Japan’s major dailynewspapers, The Daily Yomiuri, as well as Nippon Television, a national television network. As chairman of a supporter’s association, Shoriki collected a significant donation which went to the construction of the new Kodokan building as part of the 70th anniversary of the Kodokan. To show its appreciation for Shoriki’s efforts, the Kodokan granted him an honorary 9th degree. However, it is said that Shoriki expected instead a 10th degree and since this incident, became critical of the Kodokan (Kudo 1972). Later, Shoriki petitioned Congress to create a new mecca for the martial arts and his efforts resulted in the creation of the Budokan in 1964 (Oimatsu 1970). It was due to these reasons that the judo events during the 1964 Summer Olympics were held at the Budokan and not the Kodokan. Behind the conflict of the AJJF and AJSJF lay the conflict between Shoriki and the Kodokan." (p.308-309).

AJJF = All Japan Judo Federation
AJSJF = All Japan Student Judo Federation


"A razão direta para a AJSJF separar-se da AJJF foi um reação contra o controle rígido da AJJF durante o 1o Torneio de Judô Estudantil Internacional - A Copa Shoriki. Como indicado pelo nome do torneio, o torneio foi realizado em comemoração a Matsutaro Shoriki, presidente Congressional Judo Federation e CEO de um dos principais jornais diários do Japão, The Daily Yomiuri, como também da Televisão Nippon, uma rede de televisão nacional. Como presidente de uma associação de patrocinadores, Shoriki coletou uma significante doação que resultou na construção do novo prédio da Kodokan como parte do 70o aniversário da Kodokan. Para mostrar seu apreço pelos esforços de Shoriki, a Kodokan o concedeu o 9o dan honorário. No entanto, é dito que Shoriki esperava o 10th dan e desde esse incidente, se tornou crítico da Kodokan (Kudo 1972). Depois, Shoriki solicitou ao Congresso para criar uma nova meca para as artes marciais e seus esforços resultaram na criação da Budokan em 1964 (Oimatsu 1970). Foi devido a essas razões que os eventos de judô durante os Jogos Olímpicos de verão de 1964 foram realizados na Budokan e não na Kodokan. Atrás do conflito da AJJF e AJSJF está o conflito entre Shoriki e a Kodokan" (p.308-309).

"

Suplementação de cafeína em esgrimistas

J Sports Sci. 2013 Feb 5. [Epub ahead of print]

The effect of caffeine ingestion on skill maintenance and fatigue in epee fencers.

Bottoms L, Greenhalgh A, Gregory K.

Source

a University of East London, Health and Bioscience , Water Lane , Stratford , E15 4LZ , United Kingdom.

Abstract

Abstract The ergogenic effect of caffeine on sports performance focuses predominantly on endurance sports (Doherty & Smith, 2004 ) with little research on intermittent high intensity sports. This study aimed to explore the effect of caffeine ingestion on skill maintenance following fencingsimulated exercise. Eleven competitive fencers participated (four female; seven male; age 33 ± 6.5 years). Following a maximal test to exhaustion, fencers completed two trials assessing accuracy and reaction times (Stroop test) before and after a fatiguing protocol designed to simulate the demands of a fencing competition. Skill testing involved 30 lunges to hit a target. 500 ml placebo or 3 mg · kg(-1) caffeine supplemented drink was administered after the initial reaction and skill tests in a single-blind crossover design. The fatiguing protocol involved simulating six fights with 6-minute rests between each. Fencers rated their perceived exertion (arm, legs, overall) using the Borg scale. There was no overall effect of caffeine on total skill score (P = 0.40), however there was a tendency for fewer misses with caffeine (P = 0.10). Caffeine had no effect on the Stroop Test. Caffeine produced significantly lower perceived fatigue for overall (P < 0.01). These results provide some support for caffeine producing maintenance of skill and reducing perceived fatigue during fencing.

Dormiu mal?

Biological Rhythm Research

2013

Effects of partial sleep deprivation at the end of the night on anaerobic performances in judokas  (  Article in press  )

HajSalem, M.^a , Chtourou, H.^b, Aloui, A.^b, Hammouda, O.^b, Souissi, N.^bc  

^a  Research Unit (EM2S), High Institute of Sport and Physical Education, Sfax University, Sfax, Tunisia
^b  Research Laboratory Sport Performance Optimization, National Centre of Medicine and Sciences in Sport (CNMSS), Tunis, Tunisia
^c  High Institute of Sport and Physical Education, Ksar-Saïd, Manouba University, Tunis, Tunisia

Abstract

The aim of the present study was to examine the effect of partial sleep deprivation at the end of the night (PSDE) on anaerobic performances during the Wingate test (peak (PP) and mean (MP) power) and the hand grip (HG) test in judokas. In a randomized order, twenty-one judokas (age: 19.1 ± 1.2 yrs; height: 176.5 ± 4.2 cm; body mass: 77.3 ± 6.3 kg) performed two sessions after a normal sleep night (NSN) or a PSDE. During each session, they carried out the Wingate and the HG tests before (T0) and after (T1) a judo match. Rating of perceived exertion (RPE) scores were obtained at the end of the combat. PP and MP decreased significantly from T0 to T1 during the two experimental conditions (p < 0.01), and from NSN to PSDE at T0 and T1 (p < 0.05). However, the HG strength decreased only from T0 to T1 (p < 0.001) and was not significantly affected by PSDE. Likewise, the RPE scores were not affected by PSDE. Therefore, PSDE (i) reduced muscle power during the Wingate test and (ii) did not affect muscle strength during the HG test.

Suplementação de glutamina em atletas de judô

Luminescence

2013

Effect of glutamine supplementation on neutrophil function in male judoists  (  Article in press  )

Sasaki, E.^a , Umeda, T.^a, Takahashi, I.^a, Arata, K.^b, Yamamoto, Y.^b, Tanabe, M.^ab, Oyamada, K.^a, Hashizume, E.^c, Nakaji, S.^a  

^a  Department of Social Medicine Hirosaki University Graduate School of Medicine Hirosaki, Aomori Japan
^b  Department of Physical Education Nippon Sport Science University Setagaya Tokyo Japan
^c  Healthcare Products Development Center Kyowa Hakko Bio Co., Ltd. Tsukuba Japan

Abstract

Glutamine is an important amino acid for immune function. Though high intensity and prolonged exercise decreases plasma glutamine concentration and causes immune suppression, the relationship between neutrophil functions and glutamine has not yet been found. The purpose of this study was to investigate the impacts of glutamine supplementation on neutrophil function. Twenty-six male university judoists were recruited. Subjects were classified into glutamine and control groups. The glutamine group ingested 3000 mg of glutamine per day and the control group ingested placebo for 2 weeks. Examinations were performed at the start of preunified loading exercise (pre-ULE), then 1 and 2 weeks after ULE (post-ULE). Reactive oxygen species (ROS) production, phagocytic activity, serum opsonic activity and serum myogenic enzymes were measured. Differences between the levels obtained in pre-ULE and post-ULE for the two groups were compared. In the glutamine group, ROS production activity increased 1 week after ULE, whereas it was not observed in the control group (P<0 .001="" activity="" after="" an="" and="" by="" damage="" during="" enzymes="" especially="" even="" excessive="" function="" glutamine="" group="" has="" in="" increased="" intensive="" muscle="" myogenic="" nbsp="" neutrophil="" of="" p="" period.="" prevented="" production="" remained="" ros="" significantly="" supplementation="" suppression="" the="" though="" training="" ule.="" ule="" unchanged="">

Arbitragem no judô

European Journal of Sport Science

2013

Judges in judo conform to the referee because of the reactive feedback system  (  Article in press  )

Boen, F.^a , Ginis, P.^b, Smits, T.^c  

^a  Department of Kinesiology, KU Leuven, Tervuursevest 101, Heverlee, Leuven 3001, Belgium
^b  Department of Rehabilitation Sciences, KU Leuven, Leuven, Belgium
^c  Institute for Media Studies, KU Leuven, Leuven, Belgium

Abstract

This experiment tested whether the conformism observed among panels of judges in aesthetic sports also occurs among judges in judo. Similar to aesthetic sports, judo judging relies upon a form of open feedback. However, in judo, this system is reactive (i.e. two judges have to publicly 'correct' the score given by the higher-status referee), whereas it is active in aesthetic sports (i.e. judges with equal status report their score simultaneously and can use the feedback about the scores of their colleagues for evaluating later performances). In order to test whether such reactive open-feedback system leads to conformism among judges in judo, we designed an experiment in which this feedback was manipulated. Participants were 20 certified Flemish judges, who had to score two sets of 11 ambiguous video sequences that are used during formation and training of judo judges: one set with feedback about the referee's score and one set without feedback. The results revealed that when participants knew the referee's score, their scores were significantly more in line with this score than when they did not know this score. More specifically, for both sets of sequences at least 10% less deviations from the referee were observed when participants were given feedback about the score of the referee. These results suggest that preventable conformism can occur in typical judo judging, that is with reactive open feedback.

Análise de lutas de TKD dos Jogos Asiáticos

ABSTRACT
Kwok HHM. Discrepancies in fighting strategies between Taekwondo medalists and non-medalists. J. Hum.
Sport Exerc. Vol. 7, No. 4, pp. 806-814, 2012. The aim of this study was to compare the fighting strategies
between medalists and non-medalists in Taekwondo. A total of 107 matches from the 16th Asian Games
had been video-taped for notational analysis. Round house kick was the most frequently used kick by the
medalists in the competition (63.29%) while cut down kick (9.26%) and push kick (7.08%) were ranked
second and third respectively. Aggressive mode of attack was the dominant fighting strategy used by the
medalists (63.17%).  Discrepancies in fighting strategies between Taekwondo medalists and non-medalists
were found in this study including mode of attack, use of turning attack, and number of types of kick
employed.
Key words: MARTIAL ARTS, NOTATIONAL ANALYSIS, ATTACK.


http://www.jhse.ua.es/jhse/article/view/428/597

Circula na internet que a UNESCO declarou o judô o esporte mais indicado para crianças...

Aqui o que verdadeiramente aparece sobre judô no site da UNESCO: duas notícias sobre karate : )
Um doce para a primeira pessoa que me enviar um link do site da UNESCO com a notícia tão propagada.

Agora que descobriram a fonte, o que vai ter de notícia do judô...

http://globoesporte.globo.com/lutas/noticia/2013/02/bicampeao-olimpico-judoca-japones-pega-cinco-anos-de-prisao-por-estupro.html

A FIJ não apoia os métodos duros de treinamento

Eu apoio métodos duros de treinamento; não apoio é espancar os atletas... The IJF Condemns Hard Training Methods

31th January 2013.

In direct connection with the complaint of a group of athletes from the national Japanese women's team, reporting the acts from their coach, the IJF strongly emphasizes its total disapproval of such behaviors.

"It has nothing to do with the spirit and philosophy of judo taught by the founding master of our sport, Master Jigoro Kano," said the President of the International Judo Federation, Mr. Marius Vizer.

 

The IJF is particularly focussed on the development and promotion of the moral code of judo. Judo is a method to develop the physical and mental capacities, whose primary concern is to maintain the health and integrity (physical and mental) of the participants. Any action that goes against these principles are banned. The IJF will therefore take all necessary measures.

 

_______________

La FIJ désapprouve les méthodes durs d'Entraînement

En lien direct avec la plainte portée par un groupe d'athlètes de la sélection nationale japonaise féminine, concernant les agissements de la part de leur coach, la FIJ tient à fortement souligner sa totale désapprobation envers de tels comportements. "Ceux-ci n'ont rien à voir avec l'esprit du judo et la philosophie enseignée par le maître fondateur de notre sport, Jigoro Kano", déclare le Président de la Fédération Internationale de Judo, M. Marius Vizer.

 

La FIJ met particulièrement l'accent sur le développement et sur la promotion du code moral du judo. Le judo est un moyen d'éducation physique et mental dont le souci premier est de préserver la santé et l'intégrité (physique et mentale) de ses pratiquants. Toute action qui va contre ces principes est bannie. La FIJ va par conséquent prendre toutes les mesures qui s'imposent.

Tem gente que acha normal...

Dica do Tanner sobre o comportamentos dos treinadores japoneses junto às atletas:
http://www.biobiochile.cl/2013/01/30/judocas-del-equipo-olimpico-japones-fueron-golpeadas-con-sables-de-bambu-por-su-entrenador.shtml

Judocas del equipo olímpico japonés fueron golpeadas con sables de bambú por su entrenador

Miércoles 30 enero 2013 | 13:58 · Actualizado: 14:05

Publicado por Alberto Gonzalez | La Información es de Agencia AFP · 1366 visitas

Imagen: Thor Matthiasson (cc)

NOTICIAS RELACIONADAS

Judoca congoleño desaparecido en Londres tras los JJOO está “de vacaciones”

Japón espera que su récord de medallas ayude al país a reconstruirse tras tsunami del 2011

Un judoca y tres entrenadores congoleños desaparecen en Londres

El mundo del judo japonés está conmocionado tras conocerse que las componentes del equipo olímpico femenino eran maltratadas regularmente por su entrenador, que las golpeaba con sables de bambú y las aboteteaba.

El escándalo saltó después de que 15 jóvenes se decidieran a denunciar el mes pasado la manera de actuar de su entrenador ante el Comité Olímpico Japonés (COJ).

Las judocas, algunas de las cuales participaron en los Juegos Olímpicos de Londres-2012, acusaron a su entrenador Ryuji Sonoda de abofetearles y de golpearles con sables de bambú como los utilizados en la práctica del kendo, una modalidad de arte marcial.

“Hemos solicitado a la Federación Japonesa de Judo que investigue y tomar las medidas necesarias si se confirman los hechos”, declaró este miércoles un responsable del COJ.

El presidente de la Federación de Judo, Koshi Onozawa aseguró que Sonoda y otros entrenadores admitieron los hechos y que fueron advertidos por el organismo.

“El pasado mes de septiembre, recibimos informaciones sobre el hecho de que Sonoda hubiese podido maltratar físicamente a sus atletas. Le interrogamos, al igual que a las deportistas, y se demostró que las acusaciones estaban fundadas”, declaró Onozawa en conferencia de prensa.

Los agresores fueron advertidos por la federación, pero no suspendidos, y amenazados con “sanciones más fuertes si se repetían tales hechos”, añadió Onozawa.

Estas informaciones se conocen semanas después del suicidio de un estudiante que era regularmente maltratado por su entrenador de básquetbol.

Según un informe publicado en enero de 2011, cada año mueren en Japón cuatro niños durante los entrenamientos de judo.

Desenvolvimento de protetor de tórax para o TKD

http://biolsport.com/fulltxt.php?ICID=1029822

Análise de capacetes no TKD

Br J Sports Med. 2013 Jan 24. [Epub ahead of print]

Safety performance evaluation of taekwondo headgear.

O'Sullivan DM, Fife GP, Pieter W, Shin I.

Source

Department of Physical Education, Chung-Ang University, Anseong, Republic of Korea.

Abstract

BACKGROUND:

With over 20 years of taekwondo concussion research highlighting the high incidence of injury, previous studies recommend an investigation of headgear impact attenuation performance.

OBJECTIVE:

To examine impact attenuation differences between the anterior, posterior and sides of selected taekwondo headgear brands.

DESIGN:

Between-groups.

SETTING:

Biomechanics laboratory.

METHODS:

Five different commercially available taekwondo headgear were selected for impact testing. A 50th percentile Hybrid II Dummy Crash Test head and neck was fitted with the selected helmet and was bolted to a 25 kg steel torso-like structure. Each headgear model was impacted eight times to the anterior, posterior and sides by a 6.75 kg bowling ball at three heights to produce 52.25, 85 and 144 J strikes.

MAIN OUTCOME MEASUREMENTS:

Resultant head linear acceleration.

RESULTS:

Two-way (Helmet×Location) mixed analysis of variance with repeated measures on the second factor was performed to determine the differences between headgear by location of impact. There was a two-way (Helmet×Location) interaction for acceleration (η(2)=0.368).

CONCLUSIONS:

Taekwondo headgear manufacturers and sport governing bodies must consider improving the design of especially anterior helmet properties.