The Effect of Vision Impairment on Competitive and Technical-Tactical Performance in Judo: Is the Present System Legitimate?

Rafael L. Kons, Kai Krabben, David L. Mann, Gabriela Fischer, Daniele Detanico

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

In judo competition for visual impairment, athletes of different classes compete against each other in the same category; B1 athletes are totally blind, whereas B2 and B3 athletes are partially sighted. To test for potential competition disparities due a single category of athletes, this study aimed to compare competitive and technical-tactical performance in visually impaired judo athletes with different degrees of visual impairment. The authors analyzed 340 judo matches from the 2012 and 2016 Paralympic Games. The scores, penalties, efficiency index, and types of medals were examined, as well as the technical variation and temporal structure. The main finding was that blind judo athletes presented lower scores (p < .05; effect size [ES] = 0.43-0.73), medals (p < .05), and efficiency (p < .05; ES = 0.40-0.73); different patterns of play; and a shorter time to lose than partially sighted athletes (p = .027; ES = 0.10-0.14). However, the penalties were similar between classes (p > .05; ES = 0.07-0.14). The odds ratio of a winning medal was 3.5-8 times less in blind athletes than in partially sighted athletes (p < .01). In conclusion, blind judo athletes presented lower competitive and technical-tactical performance than athletes with some residual functional vision. These findings provide support for the development of new evidence-based criteria for judo classification based on vision impairment.

Original languageEnglish
Pages (from-to)388-398
Number of pages11
JournalAdapted physical activity quarterly : APAQ
Volume36
Issue number3
DOIs
Publication statusPublished - 27 Jun 2019

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Martial Arts
Athletes
Numismatics
Vision Disorders
Odds Ratio

Keywords

  • combat sport
  • Paralympic sport
  • technical analysis
  • visual impairment

Cite this

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title = "The Effect of Vision Impairment on Competitive and Technical-Tactical Performance in Judo: Is the Present System Legitimate?",
abstract = "In judo competition for visual impairment, athletes of different classes compete against each other in the same category; B1 athletes are totally blind, whereas B2 and B3 athletes are partially sighted. To test for potential competition disparities due a single category of athletes, this study aimed to compare competitive and technical-tactical performance in visually impaired judo athletes with different degrees of visual impairment. The authors analyzed 340 judo matches from the 2012 and 2016 Paralympic Games. The scores, penalties, efficiency index, and types of medals were examined, as well as the technical variation and temporal structure. The main finding was that blind judo athletes presented lower scores (p < .05; effect size [ES] = 0.43-0.73), medals (p < .05), and efficiency (p < .05; ES = 0.40-0.73); different patterns of play; and a shorter time to lose than partially sighted athletes (p = .027; ES = 0.10-0.14). However, the penalties were similar between classes (p > .05; ES = 0.07-0.14). The odds ratio of a winning medal was 3.5-8 times less in blind athletes than in partially sighted athletes (p < .01). In conclusion, blind judo athletes presented lower competitive and technical-tactical performance than athletes with some residual functional vision. These findings provide support for the development of new evidence-based criteria for judo classification based on vision impairment.",
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The Effect of Vision Impairment on Competitive and Technical-Tactical Performance in Judo : Is the Present System Legitimate? / Kons, Rafael L.; Krabben, Kai; Mann, David L.; Fischer, Gabriela; Detanico, Daniele.

In: Adapted physical activity quarterly : APAQ, Vol. 36, No. 3, 27.06.2019, p. 388-398.

Research output: Contribution to JournalArticleAcademicpeer-review

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