In the first phase, the participants will carry out the rehabilitation program for hip fracture in acute phase that will last 6 weeks. Participants will be randomized between control and experimental groups. In which the therapeutic intervention is based on the usual rehabilitation guidelines that integrate exercises aimed at improving strength, gait, functional mobility and balance. In the case of the experimental group, a robotic walker will be used to practice walking.

In the second phase, participants will carry out a 6-week program to consolidate walking function. Participants will be randomized between control and experimental groups. In which the therapeutic intervention is based on the use of the robotic system for gait exercise. In the case of the experimental group, the use of virtual reality will also be integrated.

The evolution of the functional clinical scales will be studied (autonomy/independence): Fear of falling by means of the Falls Efficacy Scale International (questionnaire); The total score ranges from 16 to 64, where 16 indicates "no concern" and 64 indicates "extremely concerned about falling" during the performance of the specific activities suggested by the questionnaire.

The evolution of the functional clinical scales will be studied (autonomy/independence): Quality of life through the 36-Item Short Form Survey (SF-36) (questionnaire). The SF-36 consists of eight scaled scores, which are the weighted sums of the questions in their section. Each scale is directly transformed into a 0-100 scale on the assumption that each question carries equal weight. The lower the score the more disability.

The evolution of the functional clinical scales will be studied (autonomy/independence): Mobility using the New Mobility Test (Physical test), also known as Parker Mobility Test. It is a composite score of the patient's ability to perform: indoor walking, outdoor walking, and shopping, providing a score between 0 and 3 (0 - not at all, 1 - with help from another person, 2 - with an aid, 3 - no difficulty) for each function, resulting in a total score from 0 (no walking ability at all) to 9 (fully independent) .

The evolution of the functional clinical scales will be studied (gait and balance): Functionality through the Timed Up & Go test (physical test). Its score is the time spent (seconds) while the subject is standing from an armchair, walking 3 meters, returning to the chair walking 3 additional meters and sitting down. It is considered that scores of 10 seconds or less indicate normal mobility, 11-20 seconds are within normal limits for frail elderly and disabled patients, and greater than 20 seconds means the person needs assistance.

Descriptive analysis of system's safety: the Simulator Sickness Questionnaire, SSQ, will be collected to assess the presence of adverse effects due to cybersickness. Each item is rated with the scale from none (0), slight (1), moderate (2) to severe (3). Through some calculations, four representative scores can be found. Nausea-related subscore (N), Oculomotorrelated subscore (O), Disorientation-related subscore (D) are the scores for the symptoms for the specific aspects. Total Score (TS) is the score representing the overall severity of cybersickness experienced by the users of virtual reality systems. It is suggested that total scores can be associated with negligible (< 5), minimal (5 - 10), significant (10 - 15), and concerning (15 - 20) symptoms. A simulator resulting in total scores above 20 is considered "bad".

Gait and balance using the SWalker will be studied in a 4-meter walk at 3 different speeds for 0%, 25% and 50% of weight bearing: Timed Up & Go test (physical test). Its score is the time spent (seconds) while the subject is standing from an armchair, walking 3 meters, returning to the chair walking 3 additional meters and sitting down. It is considered that scores of 10 seconds or less indicate normal mobility, 11-20 seconds are within normal limits for frail elderly and disabled patients, and greater than 20 seconds means the person needs assistance.

Hip range of motion (ROM) (physiological parameter) will be studied (using the SWalker) in a 4-meter walk at 3 different speeds for 0%, 25% and 50% of weight bearing. In general, the average range of motion for hip extension in a healthy person is about 20-30 degrees out of a neutral stance.

Descriptive analysis of system's usability: questionnaires will be collected to assess the following aspects: general usability of the system using the System Usability Scale (questionnaire) and the Post-Study System Usability Questionnaire. The System Usability Scale score ranges from 0 to 100, being a total score above 80.3 considered excellent, a score between 68 - 80.3 is considered good, and below 68 is considered poor. The Post-Study System Usability Questionnaire score starts with 1 (strongly agree) and ends with 7 (strongly disagree). The lower the score, the better the performance and satisfaction, considering 4 neutral score.

Gait and balance using the SWalker will be studied in a 4-meter walk at 3 different speeds for 0%, 25% and 50% of weight bearing: the 10-meter walking speed (10MWT) (physical test). The 10 Metre Walk Test is a performance measure used to assess walking speed in meters per second over a short distance. The total time is recorded in m/s. Household Ambulator <0.40 m/s; Limited Community Ambulator 0.40 to <0.80 m/s; Community Ambulator ≥0.80 m/s.

Gait and balance using the SWalker will be studied in a 4-meter walk at 3 different speeds for 0%, 25% and 50% of weight bearing: the Short Physical Performance Battery test (SPPB) (physical test). SPPB scores range from zero to 12 possible points. SPPB score of 3-9 points in persons with possible sarcopenia but no mobility disability indicates frailty; SPPB score of 10 or greater for persons with no sarcopenia and no mobility disability indicates robustness. Persons with a score of 2 or lower who have sarcopenia, and mobility disability are determined to be disabled.

The electromyographic (EMG) activity of the two leg muscles (Tibialis anterior [TA] and Soleus [SOL]) (physiological parameter) will be studied (using the SWalker) in a 4-meter walk at 3 different speeds for 0%, 25% and 50% of weight bearing. It will be studied the peak amplitudes (mV) for left and right leg muscles s-EMG activity.