Quantifying Offense and Defense Workloads in Professional Rugby Union.

IF 3.5 2区 医学 Q1 PHYSIOLOGY
Luke J Stevens, Will G Hopkins, Jessica A Chittenden, Bianca Z Koper, Tiaki Brett Smith
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引用次数: 0

Abstract

Purpose: Rugby union is a contact team sport demanding high levels of physical capacity, and understanding the match workloads can be useful to inform training. In this study, the factors influencing locomotion and contact workloads for offensive and defensive ball-in-play periods are quantified.

Methods: Locomotion and contact metrics were collected from global positioning system units and videos for 31 professional players of a Super Rugby team across 14 games in the 2021 season. Data were analyzed with a generalized mixed-model procedure that included effects for type of play, playing position, match outcome, and ball-in-play time. Magnitudes were assessed with standardization, and evidence for substantial magnitudes was derived from sampling uncertainty.

Results: When offense was compared to defense, most metrics showed decisively substantial increases (small to moderate) for forwards and backs. There was decisive evidence that locomotion metrics were substantially lower (large differences) and contact metrics were higher (very large differences) when comparing forwards to backs on offense and defense. When winning was compared to losing, there was good evidence that forwards experienced small increases in overall workload on defense, and backs experienced a small increase in high-speed running and a moderate decrease in contacts on offense. Match-to-match changes associated with ball-in-play time, attributed to fatigue, were decisive (moderate to very large) across most metrics for forwards and backs in offense and defense.

Conclusions: The increased locomotion and contact workloads in offensive periods and the differing physical requirements between positions and match outcomes for both types of play are novel findings that should aid practitioners in designing effective training.

量化职业橄榄球联盟的进攻和防守工作量。
目的:橄榄球联盟是一项需要高水平体能的接触性团队运动,了解比赛的工作量有助于为训练提供参考。在本研究中,对影响进攻和防守阶段的运动和接触工作量的因素进行了量化:从全球定位系统装置和视频中收集了一支超级橄榄球队 31 名职业球员在 2021 赛季 14 场比赛中的运动和接触指标。数据采用广义混合模型程序进行分析,其中包括比赛类型、比赛位置、比赛结果和比赛中球时间的影响。通过标准化评估了影响幅度,并从抽样不确定性中得出了实质性影响幅度的证据:结果:当进攻与防守相比时,前锋和后卫的大多数指标都显示出决定性的大幅增长(小幅至中度)。有确凿证据表明,前锋和后卫在进攻和防守时,运动指标大幅降低(差异很大),接触指标提高(差异很大)。在赢球与输球的比较中,有充分证据表明,前锋在防守中的总体工作量略有增加,而后卫在进攻中的高速跑动略有增加,接触略有减少。在大多数指标中,前锋和后卫在进攻和防守中与球在比赛中的时间有关的比赛间变化是决定性的(中等至非常大),这归因于疲劳:结论:进攻阶段的运动和接触工作量增加,不同位置对体能的要求不同,这两种比赛的结果也不同,这些新发现有助于从业人员设计有效的训练。
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来源期刊
CiteScore
5.80
自引率
12.10%
发文量
199
审稿时长
6-12 weeks
期刊介绍: The International Journal of Sports Physiology and Performance (IJSPP) focuses on sport physiology and performance and is dedicated to advancing the knowledge of sport and exercise physiologists, sport-performance researchers, and other sport scientists. The journal publishes authoritative peer-reviewed research in sport physiology and related disciplines, with an emphasis on work having direct practical applications in enhancing sport performance in sport physiology and related disciplines. IJSPP publishes 10 issues per year: January, February, March, April, May, July, August, September, October, and November.
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