The Eccentric Torque Production Capacity of the Ankle, Knee, and Hip Muscle Groups in Patients with Unilateral Chronic Ankle Instability

AUTHORS

Hossein Negahban 1 , Aida Moradi-Bousari 1 , * , Saeed Naghibi 2 , Javad Sarrafzadeh 3 , Mohammad-Jafar Shaterzadeh-Yazdi 1 , Shahin Goharpey 1 , Malihe Etemadi 1 , Masood Mazaheri 4 , Awat Feizi 5

1 Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

2 Sport Science Research Center, Tehran, Iran

3 Department of Physical Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran

4 Musculoskeletal Research Center, Isfahan University of Medical Sciences, Isfahan, Iran

5 Department of Epidemiology and Biostatistics, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran

How to Cite: Negahban H, Moradi-Bousari A, Naghibi S, Sarrafzadeh J, Shaterzadeh-Yazdi M, et al. The Eccentric Torque Production Capacity of the Ankle, Knee, and Hip Muscle Groups in Patients with Unilateral Chronic Ankle Instability, Asian J Sports Med. Online ahead of Print ; 4(2):34515. doi: 10.5812/asjsm.34515.

ARTICLE INFORMATION

Asian Journal of Sports Medicine: 4 (2); 144-152
Published Online: February 26, 2013
Article Type: Research Article
Received: November 5, 2012
Accepted: February 8, 2013
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Abstract

Purpose: The aim of this study was to investigate eccentric torque production capacity of the ankle, knee and hip muscle groups in patients with unilateral chronic ankle instability (CAI) as compared to healthy matched controls.

Methods: In this case-control study, 40 participants (20 with CAI and 20 controls) were recruited based on convenient non-probability sampling. The average peak torque to body weight (APT/BW) ratio of reciprocal eccentric contraction of ankle dorsi flexor/plantar flexor, ankle evertor/invertor, knee flexor/extensor, hip flexor/extensor and hip abductor/adductor was determined using an isokinetic dynamometer. All subjects participated in two separate sessions with a rest interval of 48 to 72 hours. In each testing session, the torque production capacity of the ankle, knee, and hip muscle groups of only one lower limb was measured. At first, 3 repetitions of maximal eccentric-eccentric contraction were performed for the reciprocal muscles of a joint in a given movement direction. Then, the same procedure of practice and testing trials was repeated for the next randomly-ordered muscle group or joint of the same limb.

Results: There was no significant interaction of group (CAI and healthy controls) by limb (injured and non-injured) for any muscle groups. Main effect of limb was not significant. Main effect of group was only significant for eccentric torque production capacity of ankle dorsi flexor and hip flexor muscle groups. The APT/BW ratio of these muscles was significantly lower in the CAI group than the healthy controls (P<0.05).

Conclusion: CAI is associated with eccentric strength deficit of ankle dorsi flexor and hip flexor muscles as indicated by reduction in torque production capacity of these muscles compared to healthy controls. This strength deficit appeared to exist in both the injured and non-injured limbs of the patients.

Keywords

Eccentric Strength Lower Limb Chronic Ankle Instability

© 2013, Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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