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Relationship between Isokinetic Knee Strength and Speed, Agility, and Explosive Power in Elite Soccer Players

Author

Listed:
  • Jaroslaw Kabacinski

    (Department of Biomechanics, Poznan University of Physical Education, Królowej Jadwigi 27/39, 61-871 Poznan, Poland)

  • Piotr M. Szozda

    (Myofascial Therapy Center “FizjoMED +”, Ul. Ziębicka 24/1, 60-164 Poznan, Poland)

  • Krzysztof Mackala

    (Department of Track and Field, University School of Physical Education, Ul. Paderewskiego 35, 51-612 Wroclaw, Poland)

  • Michal Murawa

    (Department of Biomechanics, Poznan University of Physical Education, Królowej Jadwigi 27/39, 61-871 Poznan, Poland)

  • Agata Rzepnicka

    (Public Medical Center ‘Doktor Krasicki’ in Gdynia, Ul. Zakręt od Oksywia 3, 81-244 Gdynia, Poland)

  • Piotr Szewczyk

    (Faculty of Health Sciences, Calisia University, Ul. Nowy Świat 4, 62-800 Kalisz, Poland)

  • Lechoslaw B. Dworak

    (Faculty of Health Sciences, Calisia University, Ul. Nowy Świat 4, 62-800 Kalisz, Poland)

Abstract

The aim of this study was to determine the relationship between the isokinetic characteristics of knee extensors and flexors with selected motor abilities: Speed, agility, and explosive power of lower extremities of professional football players in the preparation period of a yearly training cycle. Twenty-one players (age: 24.5 ± 3.9 years; body mass: 76.7 ± 4.7 kg and body height: 183.5 ± 5.5 cm) playing in the highest Polish soccer league participated in the study. The isokinetic concentric torque of the knee extensors and flexors was measured at 300°/s, 180°/s, and 60°/s velocities. Sprint performance was assessed in the 30 m sprint test (standing start). The forward, lateral, and backward movements were assessed using the T-Test of agility. Explosive power was quantified by performing the squat jump (SJ) and countermovement (CMJ), using the force platform. Due to sport-specific demands of soccer activities measured in this experiment, the relationships between peak torque (PT) and the 30 m sprint, T-Test of agility, and power of vertical jumps (SJ and CMJ) were low or medium at speeds of 60°/s and 300°/s. One of the main reasons for the lack of high dependence of the above-mentioned factors are that the measurements were performed during the initial training period where the level of individual abilities is at a low level. Additionally, this experiment may also indicate that the measurement of isokinetic knee flexion and extension peak is effective when performed at the correct angular velocity in relation to the evaluation of the intended motion structure.

Suggested Citation

  • Jaroslaw Kabacinski & Piotr M. Szozda & Krzysztof Mackala & Michal Murawa & Agata Rzepnicka & Piotr Szewczyk & Lechoslaw B. Dworak, 2022. "Relationship between Isokinetic Knee Strength and Speed, Agility, and Explosive Power in Elite Soccer Players," IJERPH, MDPI, vol. 19(2), pages 1-11, January.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:2:p:671-:d:719897
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    References listed on IDEAS

    as
    1. Michal Lehnert & Pavel Stolfa & James J. Tufano & Petr Stastny, 2017. "Changes in Isokinetic Muscle Strength in Adolescent Soccer Players after 10 Weeks of Pre-Season Training," The Open Sports Sciences Journal, Bentham Open, vol. 10(1), pages 27-36, April.
    2. Piotr Wilkosz & Jaroslaw Kabacinski & Krzysztof Mackala & Michal Murawa & John Ostarello & Agata Rzepnicka & Lukasz Szczesny & Anna Fryzowicz & Jacek Maczynski & Lechoslaw B. Dworak, 2021. "Isokinetic and Isometric Assessment of the Knee Joint Extensors and Flexors of Professional Volleyball Players," IJERPH, MDPI, vol. 18(13), pages 1-10, June.
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