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The isokinetic strength profile of elite soccer players according to playing position

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  • Robert Śliwowski
  • Monika Grygorowicz
  • Radosław Hojszyk
  • Łukasz Jadczak

Abstract

The aim of this study was to compare isokinetic strength performance profiles in elite soccer players across different field positions. A total of 111 elite international players of Polish Ekstraklasa (the top division in Poland) were examined during the 2010–2015 seasons. The players were classified into six positional roles: central defenders (CD), external defenders (ED), central midfielders (CM), external midfielders (EM), forwards (F), and goalkeepers (G). The concentric isokinetic strength (peak torque [PT] of quadriceps and hamstrings, H/Q ratios) was calculated for the dominant leg and the non-dominant leg at angular velocity of 1.05 rad ·s–1, whereas to assess isokinetic muscle endurance, the total work [TW] at angular velocity of 4.19 rad ·s–1, was taken into consideration. The results showed that isokinetic strength performance varies significantly among players in different playing positions. The analysis of PT for quadriceps (PT-Q) and hamstrings (PT-H) generally showed that the goalkeepers and central midfielders had lower strength levels compared to other playing positions. In the case of PT-H and hamstring/quadricep (H/Q) peak torque ratios, statistically significant differences were also noted for the legs, where mean values noted for the dominant leg were higher than for the non-dominant leg. For TW for quadriceps (TW-Q) and hamstrings (TW-H), statistically significant differences were noted only between playing positions. TW-Q values for goalkeepers were lower than for central defenders and external midfielders. TW-H values for goalkeepers were lower than for central midfielders, central defenders and external midfielders. This study showed that specific functional activity of players in individual positions on the field influences the varied profile of isokinetic strength performance.

Suggested Citation

  • Robert Śliwowski & Monika Grygorowicz & Radosław Hojszyk & Łukasz Jadczak, 2017. "The isokinetic strength profile of elite soccer players according to playing position," PLOS ONE, Public Library of Science, vol. 12(7), pages 1-13, July.
    • Handle: RePEc:plo:pone00:0182177
    DOI: 10.1371/journal.pone.0182177
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    1. João Nuno Gouveia & Cíntia França & Francisco Martins & Ricardo Henriques & Marcelo de Maio Nascimento & Andreas Ihle & Hugo Sarmento & Krzysztof Przednowek & Diogo Martinho & Élvio Rúbio Gouveia, 2023. "Characterization of Static Strength, Vertical Jumping, and Isokinetic Strength in Soccer Players According to Age, Competitive Level, and Field Position," IJERPH, MDPI, vol. 20(3), pages 1-12, January.
    2. Guido Contreras-Díaz & Luis Javier Chirosa-Ríos & Ignacio Chirosa-Ríos & Antonio Riego-Ruiz & Leonardo Intelangelo & Marcelo Tuesta-Roa & Jorge Morales-Zúñiga & Daniel Jerez-Mayorga, 2023. "Dynamometric Strength Profile of Hip Muscles in Youth Soccer Players," IJERPH, MDPI, vol. 20(2), pages 1-13, January.
    3. Lazar Pajović & Lazar Toskić & Veroljub Stanković & Ljubiša Lilić & Borislav Cicović, 2023. "Muscle Contractile Properties Measured by the Tensiomyography (TMG) Method in Top-Level Football Players of Different Playing Positions: The Case of Serbian Super League," IJERPH, MDPI, vol. 20(2), pages 1-11, January.

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