Department of Physical Education Pedagogy, Lakshmibai National Institute of Physical Education, Gwalior 474002, India.
Department of Sports Biomechanics, Lakshmibai National Institute of Physical Education, Gwalior 474002, India.
Int J Environ Res Public Health. 2021 Jul 8;18(14):7324. doi: 10.3390/ijerph18147324.
This study aimed to examine inter-limb jump asymmetries and their association with sport-specific performance in young swimmers. Thirty-eight (male, n = 19; female, n = 19) regional/national level young swimmers (age: 12.3 ± 1.2 years; height: 159.6 ± 8.2 cm; body mass: 52.5 ± 9.2 kg) participated in this study. Inter-limb asymmetries were assessed for single-leg countermovement jump (CMJ) and single-leg standing long jump (SLJ). Sport-specific performance was evaluated using front crawl (i.e., 50 m and 25 m) and front crawl kick (i.e., 50 m and 25 m). The kappa coefficient revealed a "slight" level of agreement (Κ = 0.156, 0.184, and 0.197 for female, male, and all, respectively) between the direction of asymmetry for CMJ and SLJ, indicating that asymmetries rarely favored the same limb during both tests. A paired sample -test showed a significant difference ( = 0.025) between asymmetry scores obtained in CMJ and SLJ. No significant difference was found in asymmetry scores between males and females ( = 0.099 to 0.977). Additionally, no association between asymmetry scores and sport-specific performance was observed ( > 0.05). Our findings highlight the independent nature of inter-limb asymmetries derived from CMJ and SLJ among young male and female swimmers. Further, our results suggest no association between jumping asymmetries and sport-specific performance.
本研究旨在探究年轻游泳运动员的四肢跳跃不对称性及其与专项运动表现的关系。38 名（男性，n=19；女性，n=19）地区/国家级年轻游泳运动员（年龄：12.3±1.2 岁；身高：159.6±8.2cm；体重：52.5±9.2kg）参与了本研究。采用单腿反跳式（CMJ）和单腿站立跳远（SLJ）评估四肢跳跃不对称性。采用自由泳（即 50m 和 25m）和自由泳踢腿（即 50m 和 25m）评估专项运动表现。kappa 系数显示 CMJ 和 SLJ 不对称方向之间存在“轻微”的一致性（女性、男性和总体分别为Κ=0.156、0.184 和 0.197），表明在这两项测试中，不对称性很少有利于同一肢体。配对样本 t 检验显示 CMJ 和 SLJ 不对称得分之间存在显著差异（=0.025）。男性和女性之间的不对称得分没有差异（=0.099 至 0.977）。此外，不对称得分与专项运动表现之间没有相关性（>0.05）。我们的研究结果强调了年轻男性和女性游泳运动员从 CMJ 和 SLJ 中得出的四肢跳跃不对称性的独立性。此外，我们的结果表明，跳跃不对称性与专项运动表现之间没有关联。
