Essex Pathways Department, University of Essex, Colchester CO4 3SQ, UK.
Faculty for Sport, University of Ljubljana, 1000 Ljubljana, Slovenia.
Int J Environ Res Public Health. 2022 Jan 5;19(1):604. doi: 10.3390/ijerph19010604.
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 -test was used to determine the difference between paired variables. The level of significance was set at ≤ 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.
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.
本研究旨在对参加 73 公斤以下级别的男柔道运动员进行等速膝关节测试。主要目的是：建立腘绳肌的向心（CON）和离心（ECC）力量曲线以及股四头肌的 CON 力量曲线；评估不同力量比的 CON 和 ECC 峰值扭矩（PT）及其双侧不对称性差异；计算动态控制比（DCR）和 HEC。方法：对 12 名参加国家级和国际级比赛的柔道运动员进行测试，平均年龄为 19 ± 4 岁，体重为 75 ± 2 公斤，身高为 176 ± 5 厘米。所有受试者均为右手优势。等速测试在 iMOMENT、SMM 等速机器（SMM，马里博尔，斯洛文尼亚）上进行。采用配对检验来确定配对变量之间的差异。显著性水平设定为 ≤ 0.05；结果：左（L）侧和右（R）侧 Q 股四头肌 PT（L 266；R 241 Nm）、H 股四头肌 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）和 PTQ/BW（L 3.57；R 3.23 Nm/kg）之间存在统计学差异。CON 收缩时 Q 股四头肌的双侧力量不对称性为 13.52%±10.04%，H 股四头肌为 10.86%±7.67%，H 股四头肌 ECC 收缩时为 22.04%±12.13%。结论：本研究报告了 73 公斤以下级别的柔道运动员的等速力量值，强调了离心腘绳肌力量以及 DCR 和 HEC 等离心衍生力量比。结果表明，使用离心测试可以更好地检测到不对称性，而且在柔道运动员中，优势腿的离心腘绳肌力量更强，导致 DCR 和 HEC 更高。
