Methods/Design: The study includes 31 volunteers with myofascial trigger points on right trapezius muscle. Clinical and patient data were obtained from questionnaires, VAS, algometry, sono-myoelastography and myotonometry. Also, physiotherapist grip strength was measured. Subjects were randomly allocated into one of two groups: Instrumented massage or Manual massage. The intervention consisted in a single 20 minutes session of massage on the back and neck by the same therapist, depending of the group, massage was applied manually or instrumented.