 Once the sample is selected, participants will be randomly assigned to receive either a CNS-centered treatment program or a standard physiotherapy program. The CNS-centered treatment program will last for 10 weeks, conducted in 60-minute sessions on a weekly basis. In addition, participants in this group will complete a home treatment program for 30 minutes, five times a week. On the other hand, subjects assigned to the standard physiotherapy group will receive a 10-session treatment program, such as the CNS-centered treatment group. This standard treatment will include one corticosteroid infiltration provided in the early acute stage followed by a multimodal physiotherapy program including analgesic modalities e.g. TENS, cryotherapy and exercise and manual therapy techniques addressing the specific mobility deficits of each patient. Physiotherapists will be instructed not to include interventions that were similar to those used in the group receiving the CNS-focused protocol e.g. using mirrors or imagined movements and to include a home program that involves a training load comparable to that in the other group. Adherence to both interventions will be monitored using an individual treatment diary where the time of day and duration of each clinic and home session will be recorded To evaluate the results of the interventions, the subjects will be assessed at the beginning, at the end of the treatment program week 10 and at 3 and 6 months of follow-up. 