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International Journal of Martial Arts - Vol. 7

[ Article ]
International Journal of Martial ArtsVol. 7, No. 0, pp.20-35
Abbreviation: injoma
ISSN: 2287-8599 (Online)
Online publication date 25 Mar 2021
Received 08 Sep 2020 Accepted 20 Feb 2021

Contribution of Nage-waza actions to the Olympic performance: an observational 2004-2016 medalists’ study
aNational Institute of Higher Education in Science and Technology of Sports Abdellah FADHEL, Algiers, Algeria (


Winning an Olympic medal is a sporting accomplishment that rewards well-prepared judokas. Despite many studies devoted to understanding his performance, the elite judoka remained an attractive object of investigation. The study aimed to define the technical and tactical profile of the Olympic medalists.

Methods and material

The observation of 575 matches determined 6,750 Nage-waza actions performed by 112 male medalists and their opponents in four consecutive Olympic Games (2004, 2008, 2012, and 2016). Anderson-Darling assessed the normal distribution of the data; one-way ANOVA used for inter and intra-Olympic comparisons, followed by the Post hoc Tukey test. Unbiased estimator ω2 tested the effect size of the analysis of variance.


Medalists performed 6.4±2.4 attacks/match; opponents carried out 5.3±2.2 attacks/match. They have registered offensive effectiveness of 15.7±9.9% and defensive effectiveness of 95.7±4.2%. To achieve this performance, medalists executed 1.7±.6 attacks/min and their opponents’ 1.4±.5 attack/min. Their technical repertoire of 10.8±3.9 techniques has shown the technical requirements at these Olympic competitions. Ashi-waza was the most preferred, but Te-waza was the most effective.


These findings improve knowledge of the technical and tactical profile of Olympic medalists. Coaches could use them as references in judoka preparedness for future competitions.

Keywords: judo, technique, tactic, competition, high-level


The author declares that there is no conflict of interest.

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