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KMID : 1023920130150010119
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Journal of the Korean Academy of Kinesiology
2013 Volume.15 No. 1 p.119 ~ p.129
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Ankle Range of Motion, Hop Test and Limb Symmetry Index in Taekwondo Athletes with Chronic Ankle Instability
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Lim Seoung-Kil
Yim Mee-Young
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Abstract
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Introduction: The purpose of this study was to determine whether ankle ROM tests and functional performance tests are able to discriminate between involved and uninvolved legs in taekwondo athletes with unilateral chronic ankle instability.
Method: Sixteen Taekwondo athletes with chronic ankle instability were selected to participate in the study. Ankle ROM tests(dorsiflexion, plantar flexion, inversion, and eversion) and hop tests(one-legged hop test: hands freely, one-legged hop test: clasping one´s hands behind one´s back, tripple one-legged hop test, 6m hop test, and single-leg functional hop work test) were performed using involved and uninvolved limbs. The limb symmetry index(LSI, injured leg divided by uninjured and multiplied by 100) value was used for comparisons between involved and uninvolved limbs. A LSI ≥85% for an individual in the hop tests was considered normal. In order to analyze collected data and independent-t test was utilized. The statistical significance was accepted at .05 levels.
Result: There were no significant differences between involved and uninvolved limbs for ankle range of motion and the hop tests. The LSI sensitivity was very low.
Conclusion: We conclude that ankle ROM tests and the hop tests may not detect functional deficiency although subjects had chronic ankle instability. The LSI used in clinics should be interpreted with caution, because the LSI will not necessarily identify functional impairment.
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KEYWORD
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Ankle instability, Functional performance, Range of motion, Hop test
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