As primary outcome measure will be considered the 6-minute Walking Distance Test. As secondary outcomes measures will be considered the 10-meter Walking Test, Fatigue Severity Scale and the Multiple Sclerosis Quality Of Life-54, Hamilton Rating Scale for Depression, Falls Efficacy Scale, Spatio-temporal parameter with GAITRite® System, Stabilometric Assessment and measure of energy cost by COSMED K4b2. The allocation in the two groups will be done with simple randomisation.