A comparison of 3 different unilateral strength training strategies to enhance jumping performance and decrease interlimb asymmetries in soccer players

Gonzalo-Skok, Oliver, Moreno-Azze, Alejandro, Arjol-Serrano, Jose, Tous-Fajardo, Julio and Bishop, Chris ORCID: https://orcid.org/0000-0002-1505-1287 (2019) A comparison of 3 different unilateral strength training strategies to enhance jumping performance and decrease interlimb asymmetries in soccer players. International Journal of Sports Physiology and Performance, 14 (9) . pp. 1256-1264. ISSN 1555-0265 (doi:10.1123/ijspp.2018-0920)

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Abstract

Purpose: This study compared the effects of performing different unilateral strength training interventions on unilateral and bilateral jumping performance and their related asymmetries in young soccer players.

Methods: Forty-five male young (U-17) soccer players were randomly assigned to three eccentric overload training programs: The first group executed the same volume with both legs starting with the weaker leg (SVW, n=15), the second group carried out the double volume with the weaker leg and also starting with the weaker leg (DVW, n=15), and the third group performed the same volume with both legs starting with the stronger leg (SVS, n=15). Jumping performance assessment included a single-leg horizontal jump test, a triple single-leg horizontal jump test, a bilateral countermovement (CMJ) jump test and unilateral countermovement jump test. Asymmetries were also analyzed in the unilateral jumping tests.

Results: CMJ was improved (effect size [ES]: 0.27-0.48) and CMJ asymmetry was possibly reduced (ES: 0.08-0.24) in all groups. Substantial improvements were found in triple hop (ES: 0.52-0.71) in SVW and DVW, and triple hop asymmetry was substantially decreased (ES: 0.88) in DVW. Between-group analysis showed a substantial better performance in triple hop and horizontal hop with right leg in SVW and DVW compared to SVS.

Conclusions: Unilateral strength training programs were shown to substantially improve bilateral jumping performance, while unilateral jumping was substantially enhanced in those groups that started the training session with the weaker leg. Finally, between-limbs asymmetries in the triple hop were mainly reduced through performing the double volume with the weaker leg.

Item Type: Article
Keywords (uncontrolled): between-limbs asymmetry; eccentric overload training; injury prevention; resistance training
Research Areas: A. > School of Science and Technology > London Sport Institute > Strength and Conditioning at the London Sport Institute
Item ID: 29085
Notes on copyright: Accepted author manuscript version reprinted, by permission, from International Journal of Sports Physiology and Performance, 2019, 14(9): 1256-1264, https://doi.org/10.1123/ijspp.2018-0920. © 2019 Human Kinetics, Inc.
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Depositing User: Chris Bishop
Date Deposited: 19 Feb 2020 08:50
Last Modified: 28 May 2020 15:38
URI: https://eprints.mdx.ac.uk/id/eprint/29085

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