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Article

Monitoring of Eccentric Hamstring Strength and Eccentric Derived Strength Ratios in Judokas from a Single Weight Category

1
Essex Pathways Department, University of Essex, Colchester CO4 3SQ, UK
2
Faculty for Sport, University of Ljubljana, 1000 Ljubljana, Slovenia
*
Author to whom correspondence should be addressed.
Academic Editor: Javier Abián-Vicén
Int. J. Environ. Res. Public Health 2022, 19(1), 604; https://doi.org/10.3390/ijerph19010604
Received: 15 November 2021 / Revised: 24 December 2021 / Accepted: 4 January 2022 / Published: 5 January 2022
(This article belongs to the Special Issue Impact of Martial Arts and Combat Sports on Health)
Background: This study was designed to perform isokinetic knee testing of male judokas competing in the under 73 kg category. The main aims were: to establish the concentric (CON) and eccentric (ECC) strength profile of hamstrings (H) and CON profile of quadriceps (Q) muscles; to evaluate the differences in CON and ECC peak torques (PT) with various strength ratios and their bilateral asymmetries; the calculation of the dynamic control ratio (DCR) and H ECC to CON ratio (HEC); Methods: 12 judokas competing on a national and international levels with a mean age of 19 ± 4 years, a weight of 75 ± 2 kg and with a height of 176 ± 5 cm were tested. All the subjects were right-hand dominant. Isokinetic testing was performed on iMOMENT, SMM isokinetic machine (SMM, Maribor, Slovenia). The paired t-test was used to determine the difference between paired variables. The level of significance was set at p ≤ 0.05; Results: Statistical differences between left (L) and right (R) Q PT (L 266; R 241 Nm), H ECC PT (L 145; R 169 Nm), HQR (L 0.54; R 0.63), DCR (L 0.55; R 0.70), HEC (L 1.02; R 1.14) and PTQ/BW (L 3.57; R 3.23 Nm/kg) were shown. Bilateral strength asymmetries in CON contraction of 13.52% ± 10.04 % for Q, 10.86% ± 7.67 % for H and 22.04% ± 12.13% for H ECC contraction were shown. Conclusions: This study reports the isokinetic strength values of judokas in the under 73 kg category, emphasising eccentric hamstring strength and eccentric derived strength ratios DCR and HEC. It was shown that asymmetries are better detected using eccentric testing and that the dominant leg in judokas had stronger eccentric hamstring strength resulting in higher DCR and HEC. View Full-Text
Keywords: judo; strength ratios; bilateral asymmetries; dynamic control ratio; hamstring eccentric to concentric ratio; weigh categories judo; strength ratios; bilateral asymmetries; dynamic control ratio; hamstring eccentric to concentric ratio; weigh categories
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MDPI and ACS Style

Šimenko, J.; Karpljuk, D.; Hadžić, V. Monitoring of Eccentric Hamstring Strength and Eccentric Derived Strength Ratios in Judokas from a Single Weight Category. Int. J. Environ. Res. Public Health 2022, 19, 604. https://doi.org/10.3390/ijerph19010604

AMA Style

Šimenko J, Karpljuk D, Hadžić V. Monitoring of Eccentric Hamstring Strength and Eccentric Derived Strength Ratios in Judokas from a Single Weight Category. International Journal of Environmental Research and Public Health. 2022; 19(1):604. https://doi.org/10.3390/ijerph19010604

Chicago/Turabian Style

Šimenko, Jožef, Damir Karpljuk, and Vedran Hadžić. 2022. "Monitoring of Eccentric Hamstring Strength and Eccentric Derived Strength Ratios in Judokas from a Single Weight Category" International Journal of Environmental Research and Public Health 19, no. 1: 604. https://doi.org/10.3390/ijerph19010604

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