水球競技におけるルール改正の影響 －FINA 2018 Men’s Water Polo World Cupにおける試行ルールの分析―

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  • The influence of rule amendments on water polo matches: Analysis of the approved rules in the FINA 2018 Men's World Cup

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The purpose of this study is to examine how FINA rules amendments influenced game situations in the 2018 World Cup. Eighteen provisions of the rules amendments were implemented for this World Cup, the most impactful provision being the shortening of secondary possession time after a shot or an exclusion. It was obvious that the rate of shooting during extra-man offense was lower than before the provision's implementation due to smaller times of possession – the offense receiving only 20 seconds of secondary possession time after an exclusion – in the 2018 World Cup. Other effects of these implementations concerned substitutes and how direct shots from a free throw were awarded outside ６ meters. It is necessary to apply these rules for the improvement of match quality. In the future, it will be necessary to examine how these amendments to the rules affect water polo games through increased case analysis.

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