30-meter walking task (15 meters round trip) following by a rest period of 2 minutes. Participants are invited to perform the 30-meter walking task twice. Inertial sensors are put on each participant foot.

30-meter walking task (15 meters round trip) following by a rest period of 2 minutes. Participants are invited to perform the 30-meter walking task twice. Inertial sensors are put on each participant foot.

Gait cycle = % stance phase, % swing phase / Stride length = describes the distance between two successive footprints on the ground / walking time = time to complete the 30-meters walking test in seconds / walking speed = walking stride velocity measured in meter/second / swing width = the maximal lateral excursion of the foot during the swing phase / minimal toe clearance = minimum height of the toes during the swing phase (in meter)

Quality of life related to mobility, self-care, usual activities, pain and discomfort, anxiety and depression. Each category has a score ranging from 1 to 3 and higher values indicate a worst outcome.

Physical activity habits. IPAQ score range from 1 to 3 where a score of 3 indicates a higher practice of physical activity

Pain, function and satisfaction related to lumbar spinal stenosis. Pain subscale score range from 7 to 35 with higher values indicate a worst outcome, Function subscale score range from 5 to 20 with higher values indicate a worst outcome, Satisfaction subscale score range from 6 to 24 with higher values indicate a worst outcome. The total score is composed of the three subscales and range from 18 to 79.