Patients will receive therapeutic exercise

To assess pain-self efficacy using 10 items Pain Self-Efficacy Questionnaire (10-PSEQ). Scores range from 0 (not at all confident) and 6 (completely confident). A total score is calculated by summing the scores for each of the 10 items, yielding a maximum possible score of 60. Higher scores reflect stronger self-efficacy beliefs.

To assess pain-self efficacy using 10 items Pain Self-Efficacy Questionnaire (10-PSEQ). Scores range from 0 (not at all confident) and 6 (completely confident). A total score is calculated by summing the scores for each of the 10 items, yielding a maximum possible score of 60. Higher scores reflect stronger self-efficacy beliefs.

To assess awareness, consciousness, vigilance and observation of pain using the Pain Vigilance and Awareness Questionnaire (PVAQ). Scores range from 0 (never) to 5 (always). The total questionnaire scores range between 0 and 80. Higher scores indicate greater awareness, consciousness, vigilance and observation of pain.

To assess awareness, consciousness, vigilance and observation of pain using the Pain Vigilance and Awareness Questionnaire (PVAQ). Scores range from 0 (never) to 5 (always). The total questionnaire scores range between 0 and 80. Higher scores indicate greater awareness, consciousness, vigilance and observation of pain.

To assess catastrophizing of pain using the Pain Catastrophizing Scale (PCS). Scores range from 0 (nothing at all) to 4 (all the time). The final score range between 0 and 52 points, with higher scores indicating greater levels of catastrophism.

To assess catastrophizing of pain using the Pain Catastrophizing Scale (PCS). Scores range from 0 (nothing at all) to 4 (all the time). The final score range between 0 and 52 points, with higher scores indicating greater levels of catastrophism.

To assess fear and avoidance beliefs using Fear and Avoidance Beliefs Questionnaire (FABQ). Scores range from 0 (totally disagree) to 6 (totally agree). The total score range from 0 to 96, with a higher value reflecting a higher degree of fear avoidance beliefs.

To assess fear and avoidance beliefs using Fear and Avoidance Beliefs Questionnaire (FABQ). Scores range from 0 (totally disagree) to 6 (totally agree). The total score range from 0 to 96, with a higher value reflecting a higher degree of fear avoidance beliefs.

To assess kinesiophobia using the TAMPA Scale of Kinesiophobia (TSK). Scores range from 1 (totally disagree) to 4 (totally agree). The final score can range between 11 and 44 points, with higher scores indicating greater perceived kinesiophobia.

To assess kinesiophobia using the TAMPA Scale of Kinesiophobia (TSK). Scores range from 1 (totally disagree) to 4 (totally agree). The final score can range between 11 and 44 points, with higher scores indicating greater perceived kinesiophobia.

To assess health-related quality of life using the EuroQol-5D. Total score range from 1 (best health status) to 0 (death). The second part of the euroqol-5d is visual analogue scale that goes from 0 (worst state of health imaginable) to 100 (best state of health imaginable).

To assess health-related quality of life using the EuroQol-5D. Total score range from 1 (best health status) to 0 (death). The second part of the euroqol-5d is visual analogue scale that goes from 0 (worst state of health imaginable) to 100 (best state of health imaginable).

To assess pain pressure threshold using algometer Force One FPIX 50. With the patient sitting in a comfortable position, the different bilateral points where sensitivity is to be evaluated will be marked on the skin. The chosen points are the nail phalanx of the thumb, the gracilis muscle at its insertion, the second rib, the supraspinatus muscle, and the middle portion of the trapezius. In the order described, pressure will be applied perpendicular to the point at a speed of 1 kg/sec until the patient stops the test when the sensation is no longer just "contact", but "discomfort". 3 repetitions will be done, leaving 1 minute between each of them and the average value will be calculated.

To assess pain pressure threshold using algometer Force One FPIX 50. With the patient sitting in a comfortable position, the different bilateral points where sensitivity is to be evaluated will be marked on the skin. The chosen points are the nail phalanx of the thumb, the gracilis muscle at its insertion, the second rib, the supraspinatus muscle, and the middle portion of the trapezius. In the order described, pressure will be applied perpendicular to the point at a speed of 1 kg/sec until the patient stops the test when the sensation is no longer just "contact", but "discomfort". 3 repetitions will be done, leaving 1 minute between each of them and the average value will be calculated.

To assess temporal summation using algometer Force One FPIX 50. The pressure pain threshold will be evaluated in the flexor digitorum muscle in both forearms. The average of both measurements will be calculated. A series of 15 stimuli will be presented to one arm at an interstimulus interval of 3s and then to the other arm at an interstimulus interval of 5s, separated by a 30s interseries interval. After a short break, the series of stimuli will be repeated in reverse order. Patients will be instructed to provide numerical ratings of the magnitude of the sensation experienced during the first, fifth, tenth, and fifteenth period after repeated brief taps. They will be also asked to report on the magnitude of after-sensations present 15 and 60 s after the last stimulus in each series.

To assess temporal summation using algometer Force One FPIX 50. The pressure pain threshold will be evaluated in the flexor digitorum muscle in both forearms. The average of both measurements will be calculated. A series of 15 stimuli will be presented to one arm at an interstimulus interval of 3s and then to the other arm at an interstimulus interval of 5s, separated by a 30s interseries interval. After a short break, the series of stimuli will be repeated in reverse order. Patients will be instructed to provide numerical ratings of the magnitude of the sensation experienced during the first, fifth, tenth, and fifteenth period after repeated brief taps. They will be also asked to report on the magnitude of after-sensations present 15 and 60 s after the last stimulus in each series.

To assess pain modulation using algometer Force One FPIX 50. The pressure pain threshold will be evaluated in the tibialis anterior muscle and the deltoid muscle. Then the conditioning stimulus will be introduced. A clamp will be placed on the earlobe for 60 seconds. When pain VAS of the earlobe become more than 60 mm, pain pressure threshold will be evaluated again.

To assess pain modulation using algometer Force One FPIX 50. The pressure pain threshold will be evaluated in the tibialis anterior muscle and the deltoid muscle. Then the conditioning stimulus will be introduced. A clamp will be placed on the earlobe for 60 seconds. When pain VAS of the earlobe become more than 60 mm, pain pressure threshold will be evaluated again.

To assess muscular activity using electromyography with Biosignalplux device (Research Kit Biosignalplux, PLUX Wireless Biosignal S.A). A functional task and flexion-relaxion fenomenon will be evaluated.

To assess muscular activity using electromyography with Biosignalplux device (Research Kit Biosignalplux, PLUX Wireless Biosignal S.A). A functional task and flexion-relaxion fenomenon will be evaluated.

To assess disability using the Oswestry Disability Index (ODI). Total scores range from 0% (no limitation) to 100% (maximum functional limitation).

To assess physical activity using the International Physical Activity Questionnaire. This measure assesses the types of intensity of physical activity and sitting time that people do as part of their daily lives are considered to estimate total physical activity in Metabolic Equivalent (MET)-min/week and time spent sitting.