{"title":"Optimizing video feedback for snatch technical error correction in young weightlifters: Comparing the effectiveness of different video playback speeds","authors":"Mohamed Abdelkader Souissi, Omar Trabelsi, Olfa Tounsi, Aymen Hawani, Sofien Fekih, Hichem Souissi, Adnen Gharbi, Ahlem Amor, Swantje Scharenberg, Nizar Souissi","doi":"10.1177/17479541231208917","DOIUrl":null,"url":null,"abstract":"Researchers are actively recommending optimal modes of usage for techno-pedagogical tools to ensure that athletes reap the benefits of technology in their training. In this study, we investigated the most effective video feedback viewing speed among normal-speed (NS), half-speed (HS), and quarter-speed (QS), for technical error correction in young weightlifters during the snatch movement. A total of 37 weightlifters (25 boys and 12 girls), aged 11–12 years, were randomly divided into three groups, namely the normal-speed (control group), the half-speed, and the quarter-speed group. Participants completed a pretest (T0), a seven-week snatch learning unit, and a posttest (T1), as well as a retention test one week later (T2). Video-mediated technical analysis of the snatch movement was conducted using the Kinovea motion analysis software. The main results showed that weightlifters who viewed their feedback videos at a quarter of the normal speed (QS) achieved significantly greater improvements in the displacement of the bar in the first pull Dx2 (T1 vs. T0: 27.41 ± 26.10%, Hedges’ g = 0.87, p < 0.05; T2 vs. T0: 24.34 ± 27.11%, Hedges’ g = 1.07, p < 0.05) and the vertical displacement VTR (T1 vs. T0: 22.89 ± 14.16%, Hedges’ g = 1.16, p < 0.05) compared to those who viewed the videos at NS or HS. These findings suggest that slowing down video feedback playback to a quarter of the normal speed can be an effective strategy for enhancing technical error correction in young weightlifters.","PeriodicalId":47767,"journal":{"name":"International Journal of Sports Science & Coaching","volume":null,"pages":null},"PeriodicalIF":1.5000,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Sports Science & Coaching","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1177/17479541231208917","RegionNum":4,"RegionCategory":"教育学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"HOSPITALITY, LEISURE, SPORT & TOURISM","Score":null,"Total":0}
引用次数: 0
Abstract
Researchers are actively recommending optimal modes of usage for techno-pedagogical tools to ensure that athletes reap the benefits of technology in their training. In this study, we investigated the most effective video feedback viewing speed among normal-speed (NS), half-speed (HS), and quarter-speed (QS), for technical error correction in young weightlifters during the snatch movement. A total of 37 weightlifters (25 boys and 12 girls), aged 11–12 years, were randomly divided into three groups, namely the normal-speed (control group), the half-speed, and the quarter-speed group. Participants completed a pretest (T0), a seven-week snatch learning unit, and a posttest (T1), as well as a retention test one week later (T2). Video-mediated technical analysis of the snatch movement was conducted using the Kinovea motion analysis software. The main results showed that weightlifters who viewed their feedback videos at a quarter of the normal speed (QS) achieved significantly greater improvements in the displacement of the bar in the first pull Dx2 (T1 vs. T0: 27.41 ± 26.10%, Hedges’ g = 0.87, p < 0.05; T2 vs. T0: 24.34 ± 27.11%, Hedges’ g = 1.07, p < 0.05) and the vertical displacement VTR (T1 vs. T0: 22.89 ± 14.16%, Hedges’ g = 1.16, p < 0.05) compared to those who viewed the videos at NS or HS. These findings suggest that slowing down video feedback playback to a quarter of the normal speed can be an effective strategy for enhancing technical error correction in young weightlifters.
研究人员正在积极推荐技术教学工具的最佳使用模式,以确保运动员在训练中获得技术的好处。在这项研究中,我们调查了正常速度(NS),半速度(HS)和四分之一速度(QS)中最有效的视频反馈观看速度,以纠正年轻举重运动员在抓举运动中的技术错误。选取年龄11-12岁的举重运动员37名(男25名,女12名),随机分为正常速度组(对照组)、半速度组和四分之一速度组。参与者完成了前测(T0)、为期七周的抓取学习单元、后测(T1)以及一周后的记忆测试(T2)。用Kinovea动作分析软件对抓举动作进行视频技术分析。主要结果表明,以四分之一的正常速度(QS)观看反馈视频的举重运动员在第一次拉杆位移Dx2 (T1 vs. T0: 27.41±26.10%,Hedges的g = 0.87, p <0.05;T2 vs. T0: 24.34±27.11%,Hedges’g = 1.07, p <0.05)和垂直位移VTR (T1 vs. T0: 22.89±14.16%,Hedges ' g = 1.16, p <与在NS或HS观看视频的人相比,0.05)。这些发现表明,将视频反馈回放速度放慢到正常速度的四分之一,可能是提高年轻举重运动员技术纠错能力的有效策略。
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.