Chronic low back pain is one of the major causes of disability worldwide. Knowledge about the pathophysiology of low back pain is insufficient, and an accurate diagnosis can only be obtained in 10 to 15% of cases. The absence of a precise diagnosis leads to a therapeutic challenge due to the large number of treatments available, the overall efficacy of which is low to moderate. Therefore, the identification of subgroups of non-specific chronic low back pain patients is essential and will allow the optimization of therapeutic management. A detailed description of the stabilometric parameters associated with the evaluation of pain, kinematic disturbance and the degree of kinesiophobia would allow us to establish specific postural profiles, to propose a relevant clinical model and to improve the accuracy of the diagnosis of people with chronic low back pain. The objectives of this research project are to evaluate the relationship between stabilometric parameters and pain (main objective), lumbar kinematics, kinesiophobia, and quality of life (secondary objectives) in order to propose specific postural profiles in chronic low back pain patients.

Inclusion Criteria:

• Suffering from low back pain, possibly associated with painful gluteal radiation in the form of mono or bilateral pygalgia (non-radicular) evolving for at least three months (chronic low back pain
• Understanding and being able to express himself in French
• Giving informed, dated and signed consent

Exclusion Criteria:

• Neurosurgical criteria: (i) presence of clinical signs of compression and/or single or multi-root pain (Lumbosciatica with or without deficit signs, intermittent claudication of the cauda equina roots with possible sphincter signs), (ii) history inflammatory arthropathy (ankylosing spondylitis, rheumatoid arthritis), and (iii) history of lumbar spine surgery.
• Radiographic criteria: (i) presence on the lumbar MRI of multi-level discopathy (more than 2 discopathy), (ii) spinal instability confirmed by CT or MRI (degenerative spondylolisthesis or by isthmic lysis).
• Pregnant or breastfeeding women
• Visually impaired patient
• Patient suffering from neurological and/or orthopedic disorders that may affect balance.

The patients will be recruited within the pain unit of the General Hospital of Valenciennes, within the framework of the multidisciplinary consultation of the optimized pain and dedicated to the low back pain patients, where intervene a neurosurgeon algologist and a podiatrist posturologist.

The selection of patients enrolled in the multidisciplinary pain consultation dedicated to low back pain patients will be reviewed by the Clinical Study Technician (screening) and checked by the principal investigator before the newsletter is sent.