The study will be divided in two different groups:~A control group (group A) : they will receive a treatment with manual therapy and physical exercise.~An experimental group (group B) : they will receive the previous treatment, but also the pacient's do active muscle active contraction.~The exercise is compound by a home program of several exercises with diferent difficulties.~The contraction will consist on a combination of concentric and isometric work. being the patient's pain threshold the one that will guide us to the choice of the predominance of concentric or isometric contraction . Both groups will be joined by a five-minute work on pain education.
It is an interventional study that proves the eficacy of the manual therapy with active manual therapy and combined with exercise in cervical pain.