J Korean Acad Rehabil Med.
1998 Dec;22(6):1329-1334.
Isokinetic Evaluation of Ankle Invertor and Evertor in Patients with Chronic Ankle Sprain
- Affiliations
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- 1Department of Physical Medicine & Rehabilitation, Sungkyunkwan University, College of Medicine, Samsung Medical Center.
Abstract
OBJECTIVE
The purpose of this investigation was to document the isokinetic performance deficiencies of the invertor and evertor muscles of chronically sprained ankles. METHOD: Eversion/Inversion testing was performed by a Cybex 6000 isokinetic dynamometer at the speeds of 60degrees/sec and 120degrees/sec on 17 subjects who had unilateral chronic ankle sprain. Values were compared between the involved and uninvolved sides.
RESULTS
The inversion peak torque deficits between the involved and uninvolved extremities were significantly greater than eversion deficits at 60degrees/sec and 120degrees/sec. Evertor/Invertor peak torque ratios of involved sides at 60degrees/sec were significantly greater than uninvolved sides.
CONCLUSION
We conclude that chronic ankle sprains associate an ankle invertor weakness rather than an evertor weakness. Ankle invertor weakness might be resulted from a disuse atrophy and painful ankle inversion. Further prospective study is needed to determine the relationship between the invertor weakness and the chronic ankle sprain.
