Study Group will receive 10 sessions of rehabilitation program and nutraceutical product daily for 3 months.

Control Group will receive 10 sessions of rehabilitation program.

A total of 110 consecutive participants with previous diagnosed CR lasting more than 3 months will be enrolled in this study. After initial assessment, participants without surgical recommendation, will be included into two groups: Study Group will be received 10 sessions of rehabilitation program and nutraceutical product daily, 3 months, and Control Group will be received 10 sessions of rehabilitation program. The rehabilitation program include physical therapy (electrical muscle stimulation of the neck muscle and upper limb muscles , low-Level Laser Therapy and ultrasound) and kinetic training.

Patient-completed, condition-specific functional status questionnaire with 10 items including pain, personal care, lifting, reading, headaches, concentration, work, driving, sleeping and recreation. Score: /50 Transform to percentage score x 100 = %points Scoring: For each section the total possible score is 5: if the first statement is marked the section score = 0, if the last statement is marked it = 5. If all ten sections are completed the score is calculated Minimum Detectable Change (90% confidence): 5 points or 10 %points

The pain VAS is a unidimensional measure of pain intensity, used to record patients' pain progression, or compare pain severity between patients with similar conditions. Using a ruler, the score is determined by measuring the distance (mm) on the 10-cm line between the "no pain" anchor and the patient's mark, providing a range of scores from 0-100. Values close to 100 show a maximum value of pain, and 0 the absence of pain.

The Katz Index of Independence in Activities of Daily Living, commonly referred to as the Katz ADL, is the most appropriate instrument to assess functional status as a measurement of the participants ability to perform activities of daily living independently. Investigators typically use the tool to detect problems in performing activities of daily living and to plan care accordingly. The Index ranks adequacy of performance in the six functions of bathing, dressing, toileting, transferring, continence, and feeding. Participants are scored yes/no for independence in each of the six functions. A score of 6 indicates full function, 4 indicates moderate impairment, and 2 or less indicates severe functional impairment.