Effects of a resistance training intervention on the strength-deficit of elite young soccer players

Loturco, Irineu ORCID logoORCID: https://orcid.org/0000-0003-1309-2568, Pereira, Lucas A., Bishop, Chris ORCID logoORCID: https://orcid.org/0000-0002-1505-1287, Zanetti, Vinicius, Freitas, Tomás T. ORCID logoORCID: https://orcid.org/0000-0001-8571-3189 and Pareja-Blanco, Joe (2022) Effects of a resistance training intervention on the strength-deficit of elite young soccer players. Biology of Sport, 39 (3) . pp. 615-619. ISSN 0860-021X [Article] (doi:10.5114/biolsport.2022.106157)

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The aim of this study was to examine the effects of a traditional resistance training scheme on the relative strength (RS), relative peak-force (RPF), strength deficit (SDef), and vertical jump and sprint abilities in elite young soccer players. Thirty-five under-20 soccer players from two professional clubs were assessed before and after a 4-week competitive period. One team performed 12 sessions of a structured resistance training program and the other maintained their regular soccer-specific training and competitive routines. The resistance training program consisted of performing half-squat and jump squat exercises at distinct percentages of the one-repetition maximum. Both teams performed pre- and post-measurements in the following order: (1) countermovement jump (CMJ), (2) 20-m sprint, and (3) half-squat one-repetition maximum to determine the RS, RPF, and SDef. A two-way analysis of variance was used to test for group x time interaction among variables. Effect sizes (ES) and 95% confidence intervals (CI) were also calculated. Group x time interactions were demonstrated for RS ([ES [95%CI] = 1.21 [0.57; 1.85], P = 0.001), RPF (ES [95%CI] = 1.18 [0.52; 1.80], P = 0.001), SDef (ES [95%CI] = 0.86 [0.01; 1.71], P = 0.04), and CMJ (ES [95%CI] = 0.64 [0.28; 0.99], P = 0.001); whereas a non-significant interaction was observed for 20-m sprint performance (ES [95%CI] = 0.02 [-0.32; 0.36], P = 0.85). Traditional strength-power oriented training resulted in improved maximum strength performance and CMJ ability but, paradoxically, increased the SDef. As a consequence, stronger athletes are not necessarily able to use greater percentages of their peak-force against relatively lighter loads.

Item Type: Article
Research Areas: A. > School of Science and Technology > London Sport Institute > Strength and Conditioning at the London Sport Institute
Item ID: 33003
Notes on copyright: Copyright: Institute of Sport. This is an Open Access article distributed under the terms of the Creative Commons Attribution Share Alike 4.0 License (https://creativecommons.org/licenses/by-sa/4.0/), allowing third parties to copy and redistribute the material in any medium or format and remix, transform, and build upon the material for any purpose, even commercially, provided the original work is properly cited and states its license.
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Depositing User: Chris Bishop
Date Deposited: 23 Apr 2021 08:11
Last Modified: 29 Nov 2022 17:37
URI: https://eprints.mdx.ac.uk/id/eprint/33003

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