The effect of video assistant referee (VAR) on match performance in elite football: A systematic review with meta-analysis

Ming Li, Xing Wang, Shaoliang Zhang
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Abstract

The increased utilization of the video assistant referee (VAR) system in professional football matches has sparked academic interest, leading to investigations of its impact on various performance variables. This systematic review and meta-analysis sought to assess the impact of VAR on match performance in elite football competitions and determine its effects on diverse variables. We undertook a thorough search of electronic databases and conducted a meta-analysis using the statistical software R. The standardized mean difference (SMD) was employed to quantify the pooled effect of VAR on match performance variables, such as red cards, yellow cards, fouls, offsides, and playing times for both halves and the total game. The analysis included 12 studies, covering 10,088 matches from various elite football competitions. Homogeneity was found in the red cards group, whereas significant heterogeneity was noted in the other groups. VAR implementation correlated with a reduction in fouls (SMD = −0.187) and offsides (SMD = −0.216), indicating statistically significant decreases. Conversely, VAR led to an extension in match playing time, notably in first-half (SMD = 0.406), second-half (SMD = 0.517), and total playing time (SMD = 0.747), with all increases being statistically significant. Our findings indicate that VAR has a significant impact on match performance variables in elite football. Furthermore, the efficacy of VAR interventions differs among organizations and leagues, necessitating future research to ascertain whether VAR’s impact is universal or varies with specific competitions.
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视频助理裁判(VAR)对精英足球比赛表现的影响:系统回顾与荟萃分析
职业足球比赛中越来越多地使用视频助理裁判(VAR)系统,这引发了学术界的兴趣,并导致对其对各种表现变量的影响进行调查。本系统综述和荟萃分析旨在评估 VAR 对精英足球比赛表现的影响,并确定其对各种变量的影响。我们对电子数据库进行了全面搜索,并使用 R 统计软件进行了荟萃分析。我们采用了标准化均值差(SMD)来量化 VAR 对比赛表现变量(如红牌、黄牌、犯规、越位、上下半场比赛时间和全场比赛时间)的综合影响。分析包括 12 项研究,涵盖了各种精英足球比赛中的 10,088 场比赛。在红牌组中发现了同质性,而在其他组中则发现了明显的异质性。VAR 的实施与犯规(SMD = -0.187)和越位(SMD = -0.216)的减少相关,表明在统计上有显著的减少。相反,VAR 导致比赛上场时间的延长,尤其是上半场(SMD = 0.406)、下半场(SMD = 0.517)和总上场时间(SMD = 0.747)的延长,且所有增加均具有统计学意义。我们的研究结果表明,在精英足球比赛中,VAR 对比赛成绩变量有重大影响。此外,不同组织和联赛的 VAR 干预效果也不尽相同,因此有必要在未来开展研究,以确定 VAR 的影响是普遍存在的,还是因具体比赛而异。
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来源期刊
CiteScore
3.50
自引率
20.00%
发文量
51
审稿时长
>12 weeks
期刊介绍: The Journal of Sports Engineering and Technology covers the development of novel sports apparel, footwear, and equipment; and the materials, instrumentation, and processes that make advances in sports possible.
期刊最新文献
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