35 patients with multiple sclerosis have been enrolled in a previous study to record and analyze gait parameters.

This study aims to enroll gender and and matched healthy subjects for a control group, to compare patients' gait parameters with healthy subjects'.

Inclusion Criteria:

• subjects without any gait trouble
• age ≥ 18 and < 55 years old
• gender and age (+/- 5 years) matched

Exclusion Criteria:

• pathology with potential gait impairment
• pregnant or breast feeding patient
• patient under legal protection
• no health insurance coverage
• absence of written informed consent

35 patients with multiple sclerosis progressing for less than 5 years, age 18 to 54 years old, and handicap score (EDSS) < 2 in all the subscores concerning gait, have been enrolled in a previous observational study recording and analyzing gait parameters.

This study aims to enroll gender and aed matched healthy subjects for a control group, to compare patients' gait parameters with healthy subjects'.

The 35 patients have given their consent for this new data analysis.