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Reliability and validity of field-based fitness tests in youth soccer players

Dugdale, James H.; Arthur, Calum A.; Sanders, Dajo; Hunter, Angus M.

Authors

Calum A. Arthur

Dajo Sanders

Angus M. Hunter



Abstract

This study aimed to establish between-day reliability and validity of commonly used field-based fitness tests in youth soccer players of varied age and playing standards, and to discriminate between players without (“unidentified”) or with (“identified”) a direct route to professional football through their existing club pathway. Three-hundred-and-seventy-three Scottish youth soccer players (U11–U17) from three different playing standards (amateur, development, performance) completed a battery of commonly used generic field-based fitness tests (grip dynamometry, standing broad jump, countermovement vertical jump, 505 (505COD) and T-Drill (T-Test) change of direction and 10/20 m sprint tests) on two separate occasions within 7–14 days. The majority of field-based fitness tests selected within this study proved to be reliable measures of physical performance (ICC = 0.83–0.97; p < .01). However, COD tests showed weaker reliability in younger participants (ICC = 0.57–0.79; p < .01). The field-based fitness testing battery significantly discriminated between the unidentified and identified players; χ2 (7) = 101.646, p < .001, with 70.2% of players being correctly classified. We have shown field-based fitness tests to be reliable measures of physical performance in youth soccer players. However, results from the 505COD and T-Test change of direction tests may be more variable in younger players, potentially due to complex demands of these tests and the limited training age established by these players. While the testing battery selected in this study was able to discriminate between unidentified and identified players, findings were inconsistent when attempting to differentiate between individual playing standards within the “identified” player group (development vs. performance).

Journal Article Type Article
Acceptance Date Nov 29, 2018
Online Publication Date Dec 27, 2018
Publication Date Jul 3, 2019
Deposit Date Feb 2, 2022
Journal European Journal of Sport Science
Print ISSN 1746-1391
Electronic ISSN 1536-7290
Publisher Taylor & Francis
Peer Reviewed Peer Reviewed
Volume 19
Issue 6
Pages 745-756
DOI https://doi.org/10.1080/17461391.2018.1556739
Keywords Selection, performance, discriminate, profiling, adolescent, development
Public URL http://researchrepository.napier.ac.uk/Output/2841669