Monitoring of eccentric hamstring strength and eccentric derived strength ratios in judokas from a single weight category

Šimenko, Jožef (author), Karpljuk, Damir (author), Hadžić, Vedran (author)

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.

• Language: English
• Keywords: sport, judo, strength ratios, bilateral asymmetries, dynamic control ratio, hamstring eccentric to concentric ratio, weight categories
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FŠ - Faculty of Sport
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: 10 str.
• Numbering: Vol. 19, iss. 1, art. 604
• PID: 20.500.12556/RUL-136748
• UDC: 796.853.23
• ISSN on article: 1660-4601
• DOI: 10.3390/ijerph19010604
• COBISS.SI-ID: 92195587
• Publication date in RUL: 19.05.2022

Record is a part of a journal

• Title: International journal of environmental research and public health
• Shortened title: Int. j. environ. res. public health
• Publisher: MDPI
• ISSN: 1660-4601
• COBISS.SI-ID: 1818965

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 05.01.2022

Secondary language

• Language: Slovenian
• Keywords: šport, judo, razmerja moči, bilateralne asimetrije, dinamično nadzorno razmerje, ekscentrična mišična moč, koncentrična mišična moč, težnostne kategorije

Projects

• Funder: Other - Other funder or multiple funders
• Funding programme: Public Scholarship, Development, Disability and Maintenance Fund of the Republic of Slovenia

• Funder: ARRS - Slovenian Research Agency
• Project number: P5-0147
• Name: Kineziologija monostrukturnih, polistrukturnih in konvencionalnih športov