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KMID : 0357220110230040015
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Journal of Korean Society Physical Therapy
2011 Volume.23 No. 4 p.15 ~ p.22
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The Relationship between Hip Abductor Muscle Strength and Lumbar Instability in Patients with Chronic Low Back Pain
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Seo Jun-Kyoung
Kim Suhn-Yeop
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Abstract
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Purpose: The purpose of this study was to investigate the relationship between hip abductor muscle strength and lumbar instability in patients with chronic low back pain.
Methods: Fifty-two female patients were recruited for this study. The patients’ history was recorded and was used to determine the general characteristics of the female complaints. The women were additionally examined to determine whether the level of pain was characteristic of patients with chronic lumbar instability. The following tests were also carried out in the subjects during the examination: 1) the prone instability test. 2) the test for aberrant movement patterns during lumbar flexion test. 3) the straight leg raising test. 4) posterior-to-anterior mobility test, and 5) the test for age and strength of the hip abductor muscle following assessment of the dominant side. In particular, hip abductor muscle strength was evaluated using a dynamometer.
Results: The test results showed that the number of positive responses for the five types of lumbar instability tests performed, was significantly related to the strength of the hip abductor muscle. The average hip abductor muscle strength in total subjects was 72.89±7.66N, whereas the average hip abductor muscle strength in subjects who showed positive responses to more than four out of the five tests, was 44.70±5.79N.
Conclusion: The results demonstrated that the hip abductor muscle strength and lumbar instability were negatively correlated. The lower was the strength of the hip abductor muscle, the higher was the possibility of lumbar instability.
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KEYWORD
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Low back pain, Muscle strength dynamometer, Joint instability
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