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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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INVERSION/EVERSION STRENGTH DYSBALANCE IN PATIENTS WITH MEDIAL TIBIAL STRESS SYNDROME |
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Oğuz Yüksel1, Cengizhan Özgürbüz1  ,
Metin Ergün1, Çetin İşlegen1, Emin Taşkıran2,
Nevzad Denerel1 and Ahmet Ertat1 |
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1Sports Medicine, and 2Orthopedics and Traumatology Departments, Ege University School of Medicine, Izmir, Turkey |
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© Journal of Sports Science and Medicine (2011) 10, 737 - 742 |
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| ABSTRACT | |||
| The main purpose of the study is to investigate the inversion/eversion
muscle strength balance of the ankle in patients with medial tibial stress
syndrome (MTSS). A dysbalance of these muscles may play a role in the pathophysiology
of MTSS. Another aim is to measure the medial longitudinal arch and navicular
drop in patients with MTSS. A total of 11 patients diagnosed with MTSS in
the outpatient clinic of Ege University School of Medicine Sports Medicine
Department were enrolled in this study. The control group consisted of 11
regularly exercising individuals. The mean age of the patient group and
the control group was 21. 0 ± 1.9 years (18-23 years) and 23.2 ± 2.9 years
(18-27 years), respectively. A detailed exercise questionnaire was administered
to all subjects. Isokinetic muscle strength testing was performed at 30°/sec
and 120°/sec to assess invertor and evertor muscle strength of the ankle.
Photographs of the weight bearing and non-weight bearing foot were taken
to measure the medial longitudinal arch deformation and the navicular drop.
At 30°/sec, the average eversion concentric strength was significantly higher
in the patient group, and the inversion/eversion strength ratio was significantly
higher in the control group (p < 0.05). At 120°/sec velocity, average
concentric eversion strength was significantly higher in the patient group
(p < 0.05). The measurements of pronation indicators did not reveal any
statistically significant differences between the two groups (p > 0.05).
MTSS may occur without an increase of pronation indicators like medial longitudinal
arch deformation or navicular drop. In such cases, one of the predisposing
factors may be the strength dysbalance of the invertor/evertor muscles in
favour of the evertor muscles. This observation may be of additional value
in the prevention and therapy of MTSS. Key words: Medial tibial stress syndrome, eversion, inversion, strength dysbalance, pronation, exercise. |
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