研究資料
ラグビーのルール改正に関する研究
―2022年の新ルールの効果と影響―
2023 年 37 巻 1 号 p. 59-73
詳細
2023 年 37 巻 1 号 p. 59-73
This study aims to analyse the effects and impacts of the newly introduced 50:22 rule and goal line dropout (GLDO) rule in 2022, to obtain learnings to adapt to the new rule implementations. A total of Sixty-nine world's top-level games pre and post rule changes were used for analysis. Results showed that 1) kicking frequency increased and passing plays and contact decreased after the rule implementation. 2) The frequency and percentage of zero-pass attacks 5m out from the goal line increased and the percentage of two-passes attacks decreased before and after the rule revision. GLDO increased in-play time by 60 seconds compared to the old 5m scrum rule. 3) Although 50:22 occurs in only 30% of the analysed matches, there were changes in the aspect of kicking play by area and position, suggesting that kicking is a more important skill. 4) The defending team at 50:22 lineout and kicking team in GLDO conceded more points and took more time to escape from their own territory.
