Methods: The study was a blinded, 2-arm, nonrandomized clinical study involving 100 subjects with chronic or recurrent mechanical low back pain (intervention group) and 104 subjects without chronic mechanical low back pain (control group) between the ages of 18 and 45. A blind assessor performed weight-bearing goniometry of the ankle and big toe and the navicular drop test on all subjects in both groups.
Results: An independent t-test (inter-group) revealed a statistically significant decrease (p _ 0.05) in ankle dorsiflexion range of motion in individuals with chronic mechanical low back pain. The independent t-test suggested individuals with chronic mechanical low back pain have a significantly smaller navicular drop and higher arches (p _ 0.05).
Conclusion: This study supports previous reports suggesting decreased ankle dorsiflexion may be a factor in chronic mechanical low-back pain. Further research and replication of this study is necessary before firm conclusions or recommendations can be made.
First author: James W. Brantingham
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