廣瀬, 恒平

HIROSE, Kohei

notational analysis of game performance

[Abstract] This study aimed to examine defensive tactics in world top-level rugby sevens through a comparison with fifteen-a-side rugby using descriptive notational analysis of game performance, and the following findings were obtained. 1)The defensive tactic of not getting forward and focusing on not allowing the defensive line to be breached can also be effective. 2) It is important to improve the ability to track the ball carrier in wide open spaces and keep him from missing the tackle. 3) A high percentage of off-road pass occur, and it is important to stop them. 4) For this purpose, it is important to increase the ratio of ball tackle and assist tackle that occur. 5) Assist tackle has collateral effects, such as increasing the percentage of reloads achieved. 6) Although the ball tackle is highly effective, the low tackle is effective when the ball carrier uses a hand-off. 7) Training to get the ball with a small number of attacks is important. 8) The tactic of putting pressure on the ball carrier around the point is also effective.