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KMID : 0357220150270040196
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Journal of Korean Society Physical Therapy
2015 Volume.27 No. 4 p.196 ~ p.200
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Effects of the Support Surface Condition on Muscle Activity of Trunk Muscles during Balance Exercises in Patients with Stroke
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Jung Kyoung-Sim
Kim Yong-Su
In Tae-Sung
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Abstract
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Purpose: The purpose of this study was to examine the muscle activity of the trunk muscles during balance exercises on a stable and unstable surface in patients with stroke.
Methods: Thirteen subjects (8 males, 5 females) with stroke were enrolled in the study. Muscle activity was recorded using surface EMG electrodes from the affected side of the erector spinae, external oblique, and internal oblique muscles.
The exercise was performed under three conditions. For the first condition for balance exercise, subjects were instructed to sit on an exercise mat with legs extended. The second condition was to sit with legs extended, with a balance pad under their buttocks. The third condition was to sit with legs extended, have a balance pad under the buttocks and a balance cushion under the lower legs.
Results: This study showed significant differences in EMG activities during both arm lifting exercise and weight shifting exercise between conditions. This study showed that the EMG activities of the erector spinae, external oblique, and internal oblique muscles were significantly higher when the trunk exercise was performed using the balance pad with balance ball than when using the stable surface.
Conclusion: In conclusion, performing balance exercises using an unstable surface is a useful method for facilitating trunk-muscle strength and hence trunk stability.
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KEYWORD
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Eletromyography, Stroke, Torso
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