El-Ashker Said, Chaabene Helmi, Prieske Olaf
Self-Development Department, Deanship of Preparatory Year, Imam Abdulrahman Bin Faisal University, Dammam, 31441, Saudi Arabia.
Department of Sports and Health Sciences, Faculty of Human Sciences, University of Potsdam, 14469, Potsdam, Germany.
BMC Sports Sci Med Rehabil. 2022 Mar 16;14(1):40. doi: 10.1186/s13102-022-00432-2.
Maximal isokinetic strength ratios of joint flexors and extensors are important parameters to indicate the level of muscular balance at the joint. Further, in combat sports athletes, upper and lower limb muscle strength is affected by the type of sport. Thus, this study aimed to examine the differences in maximal isokinetic strength of the flexors and extensors and the corresponding flexor-extensor strength ratios of the elbows and knees in combat sports athletes.
Forty male participants (age = 22.3 ± 2.5 years) from four different combat sports (amateur boxing, taekwondo, karate, and judo; n = 10 per sport) were tested for eccentric peak torque of the elbow/knee flexors (EF/KF) and concentric peak torque of the elbow/knee extensors (EE/KE) at three different angular velocities (60, 120, and 180°/s) on the dominant and non-dominant side using an isokinetic device.
Analyses revealed significant, large-sized group × velocity × limb interactions for EF, EE, and EF-EE ratio, KF, KE, and KF-KE ratio (p ≤ 0.03; 0.91 ≤ d ≤ 1.75). Post-hoc analyses indicated that amateur boxers displayed the largest EE strength values on the non-dominant side at ≤ 120°/s and the dominant side at ≥ 120°/s (p < 0.03; 1.21 ≤ d ≤ 1.59). The largest EF-EE strength ratios were observed on amateur boxers' and judokas' non-dominant side at ≥ 120°/s (p < 0.04; 1.36 ≤ d ≤ 2.44). Further, we found lower KF-KE strength measures in karate (p < 0.04; 1.12 ≤ d ≤ 6.22) and judo athletes (p ≤ 0.03; 1.60 ≤ d ≤ 5.31) particularly on the non-dominant side.
The present findings indicated combat sport-specific differences in maximal isokinetic strength measures of EF, EE, KF, and KE particularly in favor of amateur boxers on the non-dominant side.
This study does not report results related to health care interventions using human participants and therefore it was not prospectively registered.
关节屈肌和伸肌的最大等速肌力比是表明关节肌肉平衡水平的重要参数。此外，在格斗运动运动员中，上肢和下肢肌肉力量受运动类型影响。因此，本研究旨在探讨格斗运动运动员肘部和膝部屈肌与伸肌的最大等速肌力以及相应的屈伸肌力比的差异。
40名男性参与者（年龄 = 22.3 ± 2.5岁）来自四种不同的格斗运动项目（业余拳击、跆拳道、空手道和柔道；每个项目10人），使用等速装置在优势侧和非优势侧三个不同角速度（60、120和180°/秒）下测试肘部/膝部屈肌的离心峰值扭矩（EF/KF）和肘部/膝部伸肌的向心峰值扭矩（EE/KE）。
分析显示，EF、EE和EF - EE比、KF、KE和KF - KE比存在显著的、较大规模的组×速度×肢体交互作用（p ≤ 0.03；0.91 ≤ d ≤ 1.75）。事后分析表明，业余拳击手在非优势侧≤120°/秒时以及优势侧≥120°/秒时显示出最大的EE力量值（p < 0.03；1.21 ≤ d ≤ 1.59）。在业余拳击手和柔道运动员的非优势侧≥120°/秒时观察到最大的EF - EE力量比（p < 0.04；1.36 ≤ d ≤ 2.44）。此外，我们发现空手道运动员（p < 0.04；1.12 ≤ d ≤ 6.22）和柔道运动员（p ≤ 0.03；1.60 ≤ d ≤ 5.31）的KF - KE力量指标较低，尤其是在非优势侧。
目前的研究结果表明，格斗运动项目在EF、EE、KF和KE的最大等速肌力测量方面存在特定差异，特别是非优势侧有利于业余拳击手。
本研究未报告与使用人类参与者的医疗保健干预相关的结果，因此未进行前瞻性注册。
