Use of Inertial Units in Patient With Multiple Sclerosis (IMUSEP)

Inclusion Criteria for patient: * Age 18 to 65 (inclusive) * Expanded Disability Status Scale (EDSS) ≤ 4 * Proficient in French * Agreeing to participate in the study and having signed the informed consent form * Affiliated with a social security scheme Inclusion Criteria for Volunteers: * Age 18 to 65 (inclusive) * Proficient in French * Agreeing to participate in the study and having signed the informed consent form * Affiliated with a social security plan Exclusion Criteria for patient: * MS crisis within the last 6 weeks * Botulinum toxin injection in the last 3 months * Neurological pathology other than MS * Disabling musculoskeletal pathology * Unstable cardiac and respiratory pathology * Pregnant women * Patients with comprehension or cognitive disorders * Recent change in background treatment (\< 3 months) * Patients under guardianship or curatorship * Presence of implanted electronic devices of any kind, including pacemakers or similar assistive devices, electronic infusion pumps and implanted pacemakers * Allergy to silver Exclusion Criteria for Volunteers: * Neurological pathology * Rheumatological pathology * Antecedent of sprains (\< 3 months), fractures (\< 1 year) in the lower limbs * Pregnant women * Person under guardianship or trusteeship * Presence of implanted electronic devices of any kind, including pacemakers or similar assistive devices electronic infusion pumps and implanted pacemakers * Allergy to silver