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标题：THE IMPACT OF NEW RULE CHANGES IN JUDO: A COMPARISON OF POINTS AND PENALTIES DURING GRAND SLAM PARIS BETWEEN 2016 AND 2017
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作者：Bayram CEYLAN ; Şükrü Serdar BALCI
期刊名称：International Journal of Sport, Exercise and Training Sciences
电子版ISSN：2149-8229
出版年度：2017
卷号：3
语种：English
出版社：Balikesir University
摘要：In 2016 the International Judo Federation (IJF) started to test new rules to promote the rules of judo and make them easier to understand as well as to simplify them. IJF stated that the purpose of these rules was to give priority to the attack and to the realization of ippons. Duration of the competition for both women and men was changed as 4 mins. Points and penalties were rearranged,thus important changes were made (IJF Refereeing Rules 2017). PURPOSE: The purpose of this study was to compare the points and penalties between before and after the rule changes in judo. METHOD: The data were obtained from the judo world tour and ranking list website(http://www.judobase.org). Archive data from this official site are open-access and there are no ethical issues involved in the analysis. The data were collected from the scoreboards directly,so includes any errors made by volunteer operators. The chi square test for linear trends in proportions was used to evaluate differences in the scores and penalties in Judo Grand Slam Paris between the 2016 and 2017. The odds ratio was used to estimate effect size. Statistical significance was set at a level of p < 0.05. RESULTS: The frequency of ippon and hansoku-make did not significantly change after the new rules in men and women (p>0.05). The new rules caused to increase in wazari score for both group,while decreasing total number of shido only for men (p<0.05). DISCUSSION: Rule change in 2017 aimed at more active and watchable judo. When competitions were evaluated only in terms of points and penalties by ignoring activities during the competition,it was observed that the number of ippon and total points did not change while total number of penalties decreased. This result showed that new rule change did not achieve its objective in terms of points but it was effective with regard to decreasing penalties.