Experimento interessante: efeito do barulho sobre as decisões da arbitragem em lutas de Muay Thai com lutadores da casa e visitantes

Front Psychol. 2012;3:346. Epub 2012 Sep 14.

The Impact of Crowd Noise on Officiating in Muay Thai: Achieving External Validity in an Experimental Setting.

Myers T, Balmer N.

Source

Newman University College Birmingham, UK.

Abstract

Numerous factors have been proposed to explain the home advantage in sport. Several authors have suggested that a partisan home crowd enhances home advantage and that this is at least in part a consequence of their influence on officiating. However, while experimental studies examining this phenomenon have high levels of internal validity (since only the "crowd noise" intervention is allowed to vary), they suffer from a lack of external validity, with decision-making in a laboratory setting typically bearing little resemblance to decision-making in live sports settings. Conversely, observational and quasi-experimental studies with high levels of external validity suffer from low levels of internal validity as countless factors besides crowd noise vary. The present study provides a unique opportunity to address these criticisms, by conducting a controlled experiment on the impact of crowd noise on officiating in a live tournament setting. Seventeen qualified judges officiated on thirty Thai boxing bouts in a live international tournament setting featuring "home" and "away" boxers. In each bout, judges were randomized into a "noise" (live sound) or "no crowd noise" (noise-canceling headphones and white noise) condition, resulting in 59 judgments in the "no crowd noise" and 61 in the "crowd noise" condition. The results provide the first experimental evidence of the impact of live crowd noise on officials in sport. A cross-classified statistical model indicated that crowd noise had a statistically significant impact, equating to just over half a point per bout (in the context of five round bouts with the "10-point must" scoring system shared with professional boxing). The practical significance of the findings, their implications for officiating and for the future conduct of crowd noise studies are discussed.

Campeonato Paulista de Kendô

Dica do Guilherme Oliveira:

*** Campeonato Paulista de Kendo 2012 ***
Dia 14 de Outubro de 2012, no Parque Esportivo dos
Trabalhadores.
Endereço: Rua Canuto de Abreu, s/n°, Tatuapé – SP
Data e horário: dia 14 de Outubro de 2012, a partir das 8h

Soco no karate: diferenças entre homens e mulheres

Percept Mot Skills. 2012 Aug;115(1):228-40.

Sex differences in electromechanical delay during a punch movement.

Ferreira MA, Vencesbrito AM.

Source

Sport Sciences School of Rio Maior, Polytechnic Institute of Santarém, Rio Maior, Portugal. marioarf@gmail.com

Abstract

This study assessed how sex of participant is related to electromechanical delay during a karate punch. Ten male (M age = 25.00 yr., SD = 3.02; M height=174.9 cm, SD=6.3; M weight = 71.13 kg, SD=9.35) and 8 female (M age = 27.4 yr., SD = 6.0; M height = 161.4 cm, SD = 5.1; M weight = 59.09 kg, SD = 7.00) karate athletes performed 10 ballistic punches to a target as hard as possible. Kinematic analysis and surface electromyographic (EMG) activity of the upper-limb muscles were recorded. Men had a significantly shorter electromechanical delay in the anterior portion of the deltoid, showing a larger effectiveness in the transfer of the contractile force for the beginning of movement. Agonist and antagonist relationships show intermuscular coordination differences between the sexes. Results revealed the existence of a different neuromuscular coordination pattern of motor control between men and women, although a similar kinematic pattern was expected due to karate practice.

Verdadeiro Shrek foi lutador

http://superdicas.de/cinema/filmes/shrek-de-verdade-maurice-tillet-luta-livre.html

Crioterapia após treinamento de BJJ

http://www.jhse.ua.es/jhse/article/view/387/561

Éder Jofre em ação

http://uolesporte.blogosfera.uol.com.br/2012/09/22/eder-jofre-e-estrela-de-videoclipe-e-mostra-forma-no-boxe-aos-76-anos/

Home advantage no judô

Journal of Sports Sciences, 2012; 1–7, iFirst article

Home advantage in judo: A study of the world ranking list
Abstract
In 2009, the International Judo Federation established a ranking system (RS) to classify athletes and to distribute the competitor quotas of the Olympic Games. However, the RS does not consider the home advantage. This issue has not been studied in judo, and its implications for the RS have not been determined. The objective was to verify the home advantage in judo in terms of winning a medal or the number of matches won. Therefore, 25 competitions that computed points for the RS in 2009 were analysed. Logistic regression analysis and the Poisson generalised linear model were used for the analyses, which included the relative quality of the athletes. The sample was composed only of athletes who had competed both at home and away. The odds ratio for winning medals was higher for athletes who competed at home for both males and females. The association between the number of matches won and competing at home was significant only for the male athletes. The home advantage was observed in the competitions that used the judo RS. Thus, it is likely that athletes from countries that host competitions using the RS have an advantage in terms of obtaining their Olympic classification.

http://www.tandfonline.com/doi/pdf/10.1080/02640414.2012.725855