Performance across the isokinetic velocity spectrum: Interpretation for individuals after anterior cruciate ligament reconstruction

IF 1.4 3区医学 Q4 ENGINEERING, BIOMEDICAL

Clinical Biomechanics Pub Date : 2025-05-02 DOI:10.1016/j.clinbiomech.2025.106544

A. Culiver , B.L. Riemann , D. Bennion , E. Schlichting , J. Perry , C. Brunst , L.C. Schmitt

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引用次数: 0

Abstract

Background

Quadriceps strength recovery is a focal point of rehabilitation after anterior cruciate ligament reconstruction. Quadriceps function at slow, moderate and faster isokinetic speeds may prove useful to identify individuals with abnormal muscular force-velocity properties. This study's purpose was to investigate changes in quadriceps peak torque and total work across the isokinetic velocity spectrum and assess between the reconstructed limb, uninvolved limb and a control group limb.

Methods

20 participants after primary anterior cruciate ligament reconstruction and 20 control participants performed 5 repetitions of maximal effort knee extension and flexion at 20°/s, 60°/s, 120°/s, 240°/s, 400°/s. Data were averaged across the middle 3 repetitions at each isokinetic velocity and two-way repeated measures analysis of variance models were conducted to evaluate differences among the limbs. Post-hoc polynomial trend analyses and limb differences at each velocity were evaluated using Bonferroni adjusted contrasts.

Findings

The involved limb demonstrated lower peak torque and total work at all isokinetic velocities compared to the uninvolved and control limbs. There were no differences between the uninvolved limb and control group limb at any velocity. Trend analyses revealed the involved limb decreased at a significantly different rate across the isokinetic velocity spectrum, compared to the uninvolved and control limbs, for peak torque and total work.

Interpretation

Individuals 4 months after anterior cruciate ligament reconstruction demonstrate maximal and sustained quadriceps strength deficits compared to their uninvolved limb and control individuals. The convergence of peak torque and total work across the isokinetic velocity spectrum indicates that slower isokinetic velocities are more discriminative than faster isokinetic velocities for quadriceps testing.

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跨等速速度谱的表现：对前交叉韧带重建后个体的解释

背景：股四头肌力量恢复是前交叉韧带重建后康复的重点。股四头肌在慢速、中速和较快等速下的功能可能有助于识别肌肉力-速度特性异常的个体。本研究的目的是研究四头肌峰值扭矩和总功在等速速度谱上的变化，并评估重建肢体、未受累肢体和对照组肢体之间的差异。方法20例原发性前交叉韧带重建术患者和20例对照组患者分别以20°/s、60°/s、120°/s、240°/s、400°/s的速度进行5次最大力度的膝关节伸展和屈曲。在每个等速下取中间3次重复数据的平均值，并对方差模型进行双向重复测量分析，以评估四肢之间的差异。利用Bonferroni调整后的对比，对每个速度下的事后多项式趋势分析和肢体差异进行了评估。结果：与未受累肢体和控制肢体相比，受累肢体在所有等速速度下表现出更低的峰值扭矩和总功。未受累肢体与对照组肢体在任何速度下均无差异。趋势分析显示，在等速速度谱上，与未参与肢和控制肢相比，参与肢的峰值扭矩和总做功的下降速度明显不同。解释：与未受累肢体和对照组相比，前交叉韧带重建4个月后的个体表现出最大和持续的股四头肌力量不足。峰值扭矩和总功在等速速度谱上的收敛表明，在股四头肌测试中，较慢的等速速度比较快的等速速度更具判别性。

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

Clinical Biomechanics 医学-工程：生物医学

CiteScore

3.30

自引率

5.60%

发文量

189

审稿时长

12.3 weeks

期刊介绍： Clinical Biomechanics is an international multidisciplinary journal of biomechanics with a focus on medical and clinical applications of new knowledge in the field. The science of biomechanics helps explain the causes of cell, tissue, organ and body system disorders, and supports clinicians in the diagnosis, prognosis and evaluation of treatment methods and technologies. Clinical Biomechanics aims to strengthen the links between laboratory and clinic by publishing cutting-edge biomechanics research which helps to explain the causes of injury and disease, and which provides evidence contributing to improved clinical management. A rigorous peer review system is employed and every attempt is made to process and publish top-quality papers promptly. Clinical Biomechanics explores all facets of body system, organ, tissue and cell biomechanics, with an emphasis on medical and clinical applications of the basic science aspects. The role of basic science is therefore recognized in a medical or clinical context. The readership of the journal closely reflects its multi-disciplinary contents, being a balance of scientists, engineers and clinicians. The contents are in the form of research papers, brief reports, review papers and correspondence, whilst special interest issues and supplements are published from time to time. Disciplines covered include biomechanics and mechanobiology at all scales, bioengineering and use of tissue engineering and biomaterials for clinical applications, biophysics, as well as biomechanical aspects of medical robotics, ergonomics, physical and occupational therapeutics and rehabilitation.