Test-Retest Reliability of Surface Electromyographic Measurements in Athletes With Anterior Cruciate Ligament Reconstruction: A Voluntary Response Index Analysis

Introduction: Voluntary Response Index (VRI) is used as a measure of motor control to study abnormalities of voluntary movements. This study aimed to evaluate the reliability of voluntary response index analysis in subjects with Anterior Cruciate Ligament Reconstruction (ACLR).Materials and Methods: Using surface electromyography, the VRI components of both groups of 15 ACLR and 15 healthy controls were assessed during the functional task (sit-stand-sit). The outcome variables of VRI included the magnitude and similarity index.Results: In sit to stand phase, high reliability was found (ICC=0.80-0.89) for the magnitude and similarity index in both groups. In the standing phase, high to very high reliability was found for the magnitude and similarity index in both groups (ICC=0.75-0.91). In stand to sit phase, high to very high reliability was found (ICC=0.78-0.92) for the magnitude and similarity index in both groups.Conclusion: Surface electromyographic measurements of VRI analysis demonstrated high to very high reliability in athletes with ACLR during the functional task (sit-stand-sit). The results of the current study showed that the VRI analysis in athletes after ACLR was a reliable method and can be used to evaluate motor control before and after ligament injury in these patients.

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Motor Control Changes after Innovative Aquatic Proprioceptive Training in Athletes with Anterior Cruciate Ligament Reconstruction: Voluntary Response Index Analysis

Archives of Neuroscience ◽

10.5812/ans.112185 ◽

2021 ◽

Vol In Press (In Press) ◽

Author(s):

Elie Hajouj ◽

Mohammad Reza Hadian ◽

Seyed Mohsen Mir ◽

Saeed Talebian ◽

Salah Ghazi

Keyword(s):

Motor Control ◽

Muscle Activation ◽

Cruciate Ligament ◽

Activation Patterns ◽

Response Index ◽

Muscle Activation Patterns ◽

Voluntary Response ◽

Proprioceptive Training ◽

Anterior Cruciate ◽

Functional Task

Objectives: The main aim of this study was to determine and compare the effects of innovative aquatic proprioceptive training plus conventional rehabilitation with conventional rehabilitation alone on voluntary response index (VRI) components in athletes with anterior cruciate ligament reconstruction (ACLR). Methods: Forty male athletes with ACLR (18 - 35 years of age) voluntarily participated in this study. They were randomly allocated into two groups. The conventional therapy group (n = 20) underwent conventional rehabilitation for ten weeks, three sessions a week. The aquatic proprioceptive training plus conventional rehabilitation (n = 20) group received the same conventional rehabilitation plus 30 sessions of innovative hydrotherapy exercises. Voluntary response index analysis was carried out to determine changes in motor control and muscle activation patterns based on electromyographic (EMG) outcome measures. Results: There was a significant difference in the magnitude (MAG) and similarity index (SI) between the two groups at all phases of the functional task (sit-stand-sit) (P < 0.05). Also, both groups showed a significant change in MAG and SI at all phases of the functional task (sit-stand-sit) after the intervention (P < 0.05). Effect size in both groups for MAG and SI at all phases of the functional task (sit-stand-sit) ranged from 2.5 to 4.61 and from 0.29 to 1.7, respectively. Conclusions: The incorporation of innovative aquatic proprioceptive training into conventional accelerated rehabilitation protocol can improve motor control by influencing muscle activation patterns.

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Modeling Control Adaptations During Recovery From Anterior Cruciate Ligament Reconstruction

Volume 3B: Biomedical and Biotechnology Engineering ◽

10.1115/imece2013-66071 ◽

2013 ◽

Author(s):

Louis A. DiBerardino ◽

Harry Dankowicz ◽

Elizabeth T. Hsiao-Wecksler

Keyword(s):

Anterior Cruciate Ligament ◽

Ligament Reconstruction ◽

Cruciate Ligament ◽

Functional Results ◽

Compensation Strategy ◽

Anterior Cruciate Ligament Repair ◽

Recovery Times ◽

Anterior Cruciate ◽

Functional Task ◽

Main Factor

In this paper, we aim to model a functional task affected by injury, along with the corresponding neuromuscular compensation strategy, in order to understand differences in task performance during recovery from the injury. This study is motivated by differing rates of functional task improvements during recovery from anterior cruciate ligament repair. In particular, clinical studies have shown faster recovery times for single-limb forward hopping versus single-limb crossover hopping (hopping back and forth laterally while moving forward). Modeling this hopping task will help us understand whether the main factor of the differing functional results is from the physical restrictions of the injury, the compensation strategies used to overcome these restrictions, or a combination of both. Our hypothesis is that the discrepancies in clinical functional results will be reproduced by employing a feedforward compensation strategy, where the compensation is learned and adjusted over time.

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