No-gi Brazilian jiu-jitsu: A Markovian analysis of elite-level combat dynamics

IF 1.5 4区 教育学 Q3 HOSPITALITY, LEISURE, SPORT & TOURISM
Leonardo Lamas, Matthew Heiner, Mario Ferreira, Arthur Moura, Wellington Rangel, Gilbert Fellingham, Victor Lage
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Abstract

No-gi Brazilian jiu-jitsu is a grappling-based combat sport performed without the jiu-jitsu uniform. It’s fast-growing popularity has been influenced by the contributions to competitors’ performance in mixed martial arts tournaments. This study aimed to analyze the frequency of actions, the transitions between them, and their reward–risk balance—the probability of submitting minus the probability of being submitted—among top-level competitors. Data encompassed all 93 matches (90 competitors) of the World Submission Fighting Championship-2019. Reliability was assessed by two experts (sports scientists, more than 10 years as no-gi Brazilian jiu-jitsu competitors). Data analyses used Bayesian methods for inference. Posterior distributions of the mean frequencies of actions indicate that the main actions (e.g. takedown, sweep, and back-take) tended to occur less than once per competitor in each match, except by the submission attempt (point estimate of 1.03 per match). The highest estimates for the transition probabilities between match actions were within-competitor—a guard pass action to another guard pass action (0.30); between-competitors—a takedown attempt to a submission attempt (0.15). Most of the actions presented positive reward-risk balance, particularly for the back-take, which showed the highest probability of direct transition to submission (0.45). The dynamic analysis of no-gi Brazilian jiu-jitsu matches evidenced some preferential actions’ transitions associated with winning. Findings should enhance the accuracy of performance prediction and provide evidence-based recommendations for coaches.
No-gi巴西柔术:精英级战斗动态的马尔可夫分析
No-gi巴西柔术是一种以格斗为基础的格斗运动,没有柔术制服。它的迅速普及受到了参赛者在综合格斗比赛中表现的影响。本研究旨在分析顶级竞争对手的行动频率、行动之间的转换以及他们的回报-风险平衡——提交的概率减去被提交的概率。数据包括2019年世界格斗锦标赛的全部93场比赛(90名选手)。可靠性由两位专家(体育科学家,从事巴西柔术10年以上)评估。数据分析采用贝叶斯方法进行推理。动作平均频率的后验分布表明,除了提交尝试(每场比赛1.03分的估计值)之外,每场比赛中每个选手的主要动作(例如,击倒,横扫和收回)往往少于一次。对比赛动作之间的过渡概率的最高估计是在竞争者-防守传球动作到另一个防守传球动作之间(0.30);在竞争对手之间,一次打倒尝试到一次提交尝试(0.15)。大多数行为表现出正的回报-风险平衡,特别是收回,它显示了直接过渡到提交的最高概率(0.45)。通过对巴西柔术比赛的动态分析,证明了一些与获胜相关的优先动作的转变。研究结果应提高成绩预测的准确性,并为教练员提供循证建议。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.50
自引率
15.80%
发文量
208
期刊介绍: The International Journal of Sports Science & Coaching is a peer-reviewed, international, academic/professional journal, which aims to bridge the gap between coaching and sports science. The journal will integrate theory and practice in sports science, promote critical reflection of coaching practice, and evaluate commonly accepted beliefs about coaching effectiveness and performance enhancement. Open learning systems will be promoted in which: (a) sports science is made accessible to coaches, translating knowledge into working practice; and (b) the challenges faced by coaches are communicated to sports scientists. The vision of the journal is to support the development of a community in which: (i) sports scientists and coaches respect and learn from each other as they assist athletes to acquire skills by training safely and effectively, thereby enhancing their performance, maximizing their enjoyment of the sporting experience and facilitating character development; and (ii) scientific research is embraced in the quest to uncover, understand and develop the processes involved in sports coaching and elite performance.
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