The inclusion criteria will be:
* males and females, community dwelling, age 18 or older;
* diagnosis of multiple sclerosis in a stable phase, which will be defined as a chronic progressive or relapsing-remitting pattern with no relapse during the last 3 months;
* moderate gait impairments referred to Expanded Disability Status Scale between 4 and 5,5 (this EDSS scores refers to people with restricted ambulation who do not need walking aids).
