Countermovement Jump Inefficiency Is Mostly Independent of Quadriceps Weakness in Athletes Returning to Sport After Anterior Cruciate Ligament Reconstruction.

IF 2.5 2区 医学 Q2 SPORT SCIENCES
Karl F Orishimo, Takumi Fukunaga, Ian J Kremenic, Smita Rao, Richard Magill, Wen K Ling, Malachy P McHugh, Stephen J Nicholas
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引用次数: 0

Abstract

Abstract: Orishimo, KF, Fukunaga, T, Kremenic, IJ, Rao, S, Magill, R, Ling, WK, McHugh, MP, and Nicholas, SJ. Countermovement jump inefficiency is mostly independent of quadriceps weakness in athletes returning to sport after anterior cruciate ligament reconstruction. J Strength Cond Res XX(X): 000-000, 2024-After anterior cruciate ligament reconstruction (ACLR), comparing ground reaction force (GRF) metrics during countermovement jumps (CMJs) and isokinetic quadriceps strength testing may aid in return-to-sport decision-making. The purpose of this study was to compare asymmetries in GRF metrics during bilateral and unilateral CMJs and asymmetries in quadriceps strength between patients after ACLR and healthy athletes. Twenty-two patients who had undergone ACLR and 12 healthy athletes performed isokinetic tests of quadriceps strength and maximal-effort bilateral and unilateral CMJs on force plates. Countermovement jumps force and isokinetic measurements were compared using repeated-measures analysis of variance. Associations between asymmetries in CMJ metrics and isokinetics were assessed using correlation analysis. In the patients, significant asymmetries in knee extension strength were found (24.5% at 60 °·s-1, 13% at 180 °·s-1). In addition, asymmetries were found in 4 of 6 GRF metrics during bilateral CMJs and in 10 of 15 metrics during unilateral CMJs. The control group showed no significant asymmetries in quadriceps strength or CMJ GRF metrics. Asymmetry in knee extension strength was not correlated with any bilateral CMJ asymmetries and only 2 unilateral CMJ asymmetries. Asymmetry in knee extension power was correlated with 3 bilateral CMJ asymmetries and 3 unilateral CMJ asymmetries. A comparison of GRF profiles revealed functional deficits on the involved side of the patients during both CMJs, indicating difficulty with stretch-shortening cycle function. Asymmetries were partially explained by deficits in quadriceps power but mostly independent of quadriceps weakness. Return-to-sport assessments after ACLR should include the assessment of the biomechanical efficiency of lower extremity stretch-shortening cycle function.

前交叉韧带重建后重返运动的运动员反动作跳跃效率低下与股四头肌无力无关。
摘要:Orishimo, KF, Fukunaga, T, Kremenic, IJ, Rao, S, Magill, R, Ling, WK, McHugh, MP, Nicholas, SJ。在前交叉韧带重建后重返运动的运动员中,反向动作跳跃效率低下主要与股四头肌无力无关。前交叉韧带重建(ACLR)后,比较反动作跳跃(CMJs)和等速股四头肌力量测试时的地面反作用力(GRF)指标可能有助于恢复运动决策。本研究的目的是比较双侧和单侧cmj期间GRF指标的不对称性,以及ACLR后患者和健康运动员的股四头肌力量的不对称性。22名接受ACLR的患者和12名健康运动员在力板上进行了股四头肌力量和最大努力双侧和单侧CMJs的等速测试。采用重复测量方差分析比较反运动跳跃力和等速测量。使用相关分析评估CMJ指标不对称与等速动力学之间的关系。在患者中,发现膝关节伸展力量明显不对称(60°·s-1时24.5%,180°·s-1时13%)。此外,在双侧CMJs期间,6个GRF指标中有4个存在不对称性,在单侧CMJs期间,15个指标中有10个存在不对称性。对照组在股四头肌力量或CMJ GRF指标上没有明显的不对称。膝关节伸展力量不对称与任何双侧CMJ不对称无关,仅与2个单侧CMJ不对称相关。膝关节伸展力不对称与3个双侧CMJ不对称和3个单侧CMJ不对称相关。GRF资料的比较显示,在两种CMJs期间,患者的受累侧存在功能缺陷,表明伸展-缩短周期功能存在困难。不对称的部分原因是股四头肌力量不足,但主要与股四头肌无力无关。ACLR术后恢复运动评估应包括下肢拉伸-缩短循环功能的生物力学效率评估。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
6.70
自引率
9.40%
发文量
384
审稿时长
3 months
期刊介绍: The editorial mission of The Journal of Strength and Conditioning Research (JSCR) is to advance the knowledge about strength and conditioning through research. A unique aspect of this journal is that it includes recommendations for the practical use of research findings. While the journal name identifies strength and conditioning as separate entities, strength is considered a part of conditioning. This journal wishes to promote the publication of peer-reviewed manuscripts which add to our understanding of conditioning and sport through applied exercise science.
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