Int J Sports Physiol Perform. 2018 Aug 1;13(7):903-909. doi: 10.1123/ijspp.2017-0531. Epub 2018 Jul 25.
This study examined whether changes in scrum engagement laws from the "crouch-touch-set" in 2013 to the "PreBind" engagement from 2014 onward have led to changes in scrum characteristics, specifically timing, in international rugby union. Duration and outcomes were identified for all scrums occurring in the 2013-16 Six Nations (N = 60 games) using video analysis. Scrum duration increased after the introduction of the PreBind engagement from 59 s in 2013 to 69 s in 2016 (P = .024, effect size = 0.93). A significant increase in mean contact duration per scrum occurred when prebinding was adopted (P < .05), moving from 7.5 s under the crouch-touch-set process to 8.5, 10.0, and 10.8 s with PreBind in 2014, 2015, and 2016 (effect size = 0.71, 2.05, and 3.0, respectively). The number of scrum resets and collapsed scrums, along with early engagement and pulling down infringements, was lower under the PreBind process. Overall, the PreBind engagement resulted in longer scrums with significant increases observed in overall and contact durations, with improved stability-related characteristics. The longer contact time is a consequence of increased stability with a shift from high-energy impact to a sustained push phase with a lower force that is a benefit to player welfare.
本研究旨在探讨 2013 年从“蹲触式”到 2014 年起采用的“预绑”抱架方式的变化是否导致了触式橄榄球中抱架特征（尤其是时间安排）的变化。通过视频分析，确定了 2013-16 年六国赛（N=60 场比赛）中所有触式橄榄球的持续时间和结果。在采用预绑抱架后，触式橄榄球的持续时间从 2013 年的 59 秒增加到 2016 年的 69 秒（P=0.024，效应量=0.93）。当采用预绑抱架时，每个触式橄榄球的平均接触持续时间显著增加（P<0.05），从蹲触式过程中的 7.5 秒增加到 2014 年的 8.5 秒、2015 年的 10.0 秒和 2016 年的 10.8 秒（效应量分别为 0.71、2.05 和 3.0）。在预绑抱架过程中，触式橄榄球的重置和坍塌次数、提前抱架和拉人犯规次数都有所减少。总的来说，预绑抱架导致了更长时间的触式橄榄球，总时长和接触时长都有显著增加，稳定性相关特征得到了改善。接触时间的延长是由于稳定性的提高，从高能量冲击转变为持续的推阶段，力较小，这对球员福利有益。
