Identifying the effectiveness of a chop tackle in elite and semi-professional rugby union

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Author
Evans, Lloyd
Date
2013Publisher
Cardiff Metropolitan University
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Show full item recordAbstract
The aim of this study was to analysis how effective a chop tackle was between two
different levels of rugby union. The analysis was conducted from ten Rugby World
Cup games in 2011 and ten Principality Welsh Premiership games from the recent
season 2012/13. A specific design was implemented to collect the relevant data on
different variables to create specific performance indicators. The analysis was
conducted using a hand notation system as each game was observed using different
performance indicators to code the data. A Mann Whitney U test was used to
compare the variables between RWC and WP. A Wilcoxon test was then used to
compare the differences of chop with other types of tackles at the different levels. P
values that are less than 0.05 were deemed to be significant. The 125 average
tackles per team for a match performed in the RWC were significantly greater than
88 tackles in WP (p<0.05). 31% of tackles in RWC were chop which was significantly
greater than 22% in WP (p<0.05). At both levels a chop tackle lead to significantly
more turnovers than other types of tackles, it also lead to a significantly greater
percentage of unsuccessful outcomes than other tackles (p < 0.05) . Therefore a
chop tackle is considered a high risk performance but it leads to a greater chance in
turning the ball over. This skill should be implemented as part of the team’s tactics
when they need to take risks to provide a higher chance of getting the ball back.
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