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The Relation Between Restricted Internal Rotation of the Hip (in 90° flexion) and Restricted Sidebending in the Lumbar Spine

Journal: The AAO Journal Date: 2005/12, 15(4):Pages: 23-31, type of study: clinical trial

Free full text   (https://www.academyofosteopathy.org/aaoj)

Keywords:

clinical trial [612]
hip [316]
lumbar sidebending [1]
range of motion [80]

Abstract:

Previous studies have examined the relation between bilateral hip flexion and flexion in the lumbar spine. The hypothesis of this study was that a restriction of lumbar sidebending, under influence of gravity, would be associated with a heterolateral restriction of hip internal rotation, as measured sitting with the hips flexed at 90°. The study was a classic correlation study. The subjects (n = 63) were between the ages of 24 - 44 (54% male, 46% female). The lumbar sidebending was measured using a metal ruler, with the subject standing, sitting normally and sitting with both hips in active internal rotation. The internal rotation of the hips was measured using a universal goniometer. The results showed a moderate significance (p = 0.001) between the sidebending restriction in the lumbar spine and the active internal rotation restriction in the heterolateral hip. The study showed a difference in the range of motion in the lumbar spine, in that, the mobility in the standing position is greater than that in sitting position and much greater than in the sitting position with the hips in active rotation. The study also showed that there is a difference in the internal rotation range of the hip between men and women. The range of motion is greater in women than in men with the average difference 4.3°. The study presented an interesting clinical test for osteopaths wanting to improve hip and/or lumbar mobility.


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