Test-retest reliability and comparison of single- and dual-beam photocell timing system with video-based applications to measure linear and change of direction sprint times

Rohit K Thapa, Bhargav Sarmah, Tanvi Singh, Gaurav S Kushwah, Zeki Akyildiz, Rodrigo Ramirez-Campillo
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Abstract

This study aimed to assess the test-retest reliability of untested single- and dual-beam timing gates and compare them with previously validated video-based applications to measure linear and change of direction sprint (CODS) times. Twenty-three participants were concurrently assessed for 30 m linear sprint and CODS time using single- and dual-beam timing gates and the MySprint and COD Timer applications. Interclass correlation coefficient (ICC), Pearson correlation, independent t-test and Bland-Altman plots were used for comparison between instruments. ICC, Cronbach’s alpha and coefficient of variation (CV) analyses were used to assess the test-retest reliability. Excellent ICC was noted for test-retest reliability (0.982–0.984 [sprint], 0.940–0.942 [CODS]), with a high Cronbach’s alpha (all 0.997 [sprints], 0.988–0.989 [CODS]) and acceptable CV (1.296–1.946%) for all the timing systems. Similarly, excellent ICC (0.989–0.994 [sprint], 0.998–0.999 [CODS]) and very high correlation ( r = 0.990–0.994 [sprints] and r = 0.998–1.000 [CODS]) were reported between the single- and dual-beam timing gates, and the MySprint and COD Timer applications, with non-significant differences between the measurements ( p = 0.754–0.960). However, the Bland-Altman plots represented that values measured with the three instruments were inconsistent with most values away from the mean of the difference between instruments. In conclusion, both photocell timing systems are reliable instruments for measuring linear sprint time and CODS time. However, the timing systems should not be used interchangeably to interpret findings. Furthermore, it is suggested that similar timing systems with an identical setup should be used for the measurement of timings for interpretations.
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单光束和双光束光电池计时系统与基于视频的应用程序测试的可靠性和比较,以测量线性和方向变化的冲刺时间
本研究旨在评估未测试的单波束和双波束定时门的重测可靠性,并将其与先前验证的基于视频的应用程序进行比较,以测量线性和方向改变冲刺(CODS)时间。采用单束和双束定时门以及MySprint和COD Timer应用程序,对23名参与者同时进行30米线性冲刺和CODS时间的评估。工具间比较采用类间相关系数(ICC)、Pearson相关、独立t检验和Bland-Altman图。采用ICC、Cronbach’s alpha和变异系数(CV)分析评估重测信度。卓越的ICC测试重测信度(0.982-0.984 [sprint], 0.940-0.942 [CODS]),高Cronbach 's alpha(均为0.997 [sprint], 0.988-0.989 [CODS])和可接受的CV(1.296-1.946%)。同样,单波束和双波束定时门与MySprint和COD Timer应用程序之间的ICC (0.989-0.994 [sprint], 0.998-0.999 [CODS])和非常高的相关性(r = 0.990-0.994 [sprint]和r = 0.998-1.000 [CODS]),测量结果之间无显著差异(p = 0.754-0.960)。然而,Bland-Altman图表示,用三种仪器测量的值与大多数远离仪器之间差异均值的值不一致。总之,这两种光电池计时系统都是测量线性冲刺时间和CODS时间的可靠仪器。然而,计时系统不应该互换使用来解释调查结果。此外,建议使用具有相同设置的类似计时系统来测量解释的计时。
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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
Effects of training repetition on young footballers’ tactical and physical performances: free and conditioned large-sided games A single trunk-mounted wearable sensor to measure motor performance in triathletes during competition The effectiveness of chalk as a friction modifier for finger pad contact with rocks of varying roughness In-plane density gradation of shoe midsoles for optimal energy absorption performance Development of a video-based test for assessing decision-making proficiency in football referees
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