Biomechanical Gait Analysis in Low Back Pain

The goal of this observational case-control study is to learn whether low back pain is associated with changes in gait and related clinical characteristics in adults over 18 years old. The main questions it aims to answer are: * Are gait biomechanics different in people with low back pain compared with people without low back pain? * Are pain intensity, psychosocial risk, and physical activity levels different between both groups? Participants will complete questionnaires about low back pain, physical activity, and health status, and will perform a walking test in a motion analysis laboratory where gait parameters are recorded.