 The control group will receive 12 conventional therapy sessions over 4 weeks 3 sessionsweek, that will focus on gait training. Subjects will receive 1 hour of individual conventional physiotherapy for session. During the first 5-10 minutes the subjects will perform lower-limb and core stretching exercises to increase muscles flexibility; then theyll deal with lower-limb muscles strengthening exercises tailored on their baseline characteristics 10 minutes. After that, assisted over-ground walking training will be performed. 