Concurrent validity and intra-unit reliability of the Speedtrack X radar gun device for measuring tennis ball speed

The aim of this study was two-fold: (i) to test the concurrent validity of the Speedtrack X radar device for measuring tennis ball speed in comparison to a Pocket radar gun and (ii) to test the intra-unit reliability of the Speedtrack X radar device for measuring tennis ball speed. A total sample of...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part P, Journal of sports engineering and technology Journal of sports engineering and technology, 2022-09
Main Authors: Abdioglu, Mekki, Akyildiz, Zeki, Manuel Clemente, Filipe
Format: Article
Language:English
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Summary:The aim of this study was two-fold: (i) to test the concurrent validity of the Speedtrack X radar device for measuring tennis ball speed in comparison to a Pocket radar gun and (ii) to test the intra-unit reliability of the Speedtrack X radar device for measuring tennis ball speed. A total sample of 116 tennis ball throws performed by the same machine were measured in a single session. All throws were simultaneously measured by one Pocket radar device (reference criterion) and one Speedtrack X radar gun. Reliability levels were calculated using Pearson’s correlation test (r), the intra-class correlation test (ICC), and coefficient of variation (CV), while concurrent validity was tested using Bland-Altman and effect size (for measuring between-device differences). High correlation between the data obtained from the two devices was found (r = 0.932, p 
ISSN:1754-3371
1754-338X
DOI:10.1177/17543371221122027