Participants will perform movements while receiving different visual cues. Spinal kinematics will be measured during these movements and compared between asymptomatic and CLBP participants. Participants will come for a unique session.

Inclusion Criteria:

- sufficient French level to understand the instructions for the tests, the information sheet, the consent form.

For CLBP patients:

- diagnosis of non-specific low back pain (pain from lower ribs to gluteal folds) for more than 3 months.

For asymptomatic participants:

• no history of LBP requiring medical attention during the last two years
• no other concomitant pain or condition that could compromise the evaluation of lumbar kinematics.

Exclusion Criteria:

• pregnancy
• skin allergy to tape
• body mass index (BMI) above 32

For patients with CLBP only:

• specific low back pain (such as the presence of infection, rheumatological or neurological diseases, spinal fractures, tumours)
• any known important spinal deformities
• previous back surgery that limits spinal mobility
• high level of pain at the time of experiment that prevents repeated movements (severity and irritability)
• other concomitant pain or condition that could compromise the evaluation of spinal kinematics.

CLBP patients will be recruited through a multimodal rehabilitation program at Lausanne University Hospital, medical doctors or physiotherapists' consultations.

Healthy controls will be a convenience sample recruited using flyers and emails, notably posted at the Lausanne University Hospital, the University of Health Professions in Lausanne (HESAV) and at the University of Lausanne.