and Objective: The scientific evidence related to the effectiveness of rehabilitation on electromyographical activity of trunk muscles is limited. This study was performed to determine the effect of movement-pattern training on frequency of selected trunk muscles during single-leg landing in individuals with non-specific chronic low back pain. Methods: In this clinical trial study, 28 patients with non-specific chronic low back pain were randomly divided into intervention and control groups.

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... control group did not receive treatment. The intervention group performed treatment as a movement-pattern training. Subjects performed single leg landing from 30 cm height. Trunk muscle activity was assessed using an 8-chanel EMG system. The assessments were completed in pre-test and after six weeks. Results: Frequency content of right rectus abdominus and right lumbar erector spinae in intervention group were lower than control group (P<0.05). In other muscles ant there was not any significant significant differences between interventional and control groups. Conclusion: The movement-pattern training can be used in rehabilitation of individuals with non-specific chronic low back pain.