Strength, jumping, and change of direction speed asymmetries are not associated with athletic performance in elite academy soccer players

Raya-Gonzalez, Javier, Bishop, Chris ORCID logoORCID:, Gomez-Piqueras, Pedro, Veiga Fernandez, Santiago, Viejo-Romero, David and Navander, Archit (2020) Strength, jumping, and change of direction speed asymmetries are not associated with athletic performance in elite academy soccer players. Frontiers in Psychology, 11 , 175. ISSN 1664-1078 [Article] (doi:10.3389/fpsyg.2020.00175)

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The aims of the present study were twofold: 1) to measure inter-limb asymmetries from a battery of fitness tests in youth soccer players and, 2) determine the association between asymmetry and measures of athletic performance. Sixteen elite youth soccer players (14.7 ± 0.2 years) performed a single leg Abalakov test (ABK), change of direction (COD) test over 10 m (5 + 5) and 20 m (10 + 10), and an iso-inertial power test. Subjects also performed 10 m, 20 m and 30 m sprints and a bilateral countermovement jump (CMJ), which were correlated with all ABK, COD and iso-inertial asymmetry scores. A one-way repeated measures ANOVA showed significant differences between inter-limb asymmetry scores across multiple tests (p < 0.05), with the iso-inertial power test presenting the greatest magnitude of asymmetry, while individual data highlighted substantially greater inter-individual differences in each test. Pearson’s r correlations showed no significant relationships (p > 0.05) between the different inter-limb asymmetry scores, and between asymmetry scores and athletic performance. These findings show the test-specific nature of asymmetries in youth soccer players, with the iso-inertial power test being the most sensitive in detecting asymmetry. Moreover, the results obtained suggest that inherent asymmetry in young soccer players did not negatively impact their performance.

Item Type: Article
Additional Information: Corrigendum: In the original article, the specific contributions of the authors Santiago Veiga and Pedro Gómez-Piqueras were not included in the Author Contributions statement. The corrected Author Contributions Statement appears as in
Keywords (uncontrolled): Fitness testing, Inter-limb differences, Performance reduction, power, Youth
Research Areas: A. > School of Science and Technology > London Sport Institute > Strength and Conditioning at the London Sport Institute
Item ID: 28891
Notes on copyright: © 2020 Raya-González, Bishop, Gómez-Piqueras, Veiga Fernandez, Viejo-Romero and Navandar. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
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Depositing User: Chris Bishop
Date Deposited: 27 Jan 2020 18:39
Last Modified: 29 Nov 2022 18:34

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