The efficacy of progressive muscle relaxation in combination with spinal manipulative therapy on active trigger points of the trapezius muscle

M.Tech. (Chiropractic)Purpose: The trapezius muscle is thought to be the muscle most commonly associated with the presence of active myofascial trigger points (MFTP’s). Studies of the trapezius muscle clearly show that muscular activity significantly increases in response to psychological stress. Cervical spine manipulation has been proven to be highly effective in the treatment of active MFTP’s and muscular tension. Progressive muscle relaxation (PMR) therapy is frequently utilized as a relaxation technique in subjects complaining of increased levels of muscular tension, possibly due to an increased perception of psychological stress. Although cervical spine manipulation alone is effective in the treatment of active MFTP’s and muscular tension, chiropractors often search for adjunctive therapies to improve current treatment protocols. The purpose of this study was to determine whether the combination of cervical spine manipulation and PMR therapy is a more efficient, and possibly effective, treatment protocol for active MFTP’s of the trapezius muscle. Method: This study was a comparative study and consisted of two groups of fifteen participants each. All participants were between the ages of eighteen and thirty-five years of age, with a male to female ratio of 1:1. Potential participants were examined and accepted according to the inclusion and exclusion criteria. Group A received chiropractic spinal manipulative therapy of the cervical spine. Group B was the combination group and therefore received chiropractic spinal manipulative therapy of the cervical spine together with the application of PMR therapy. Subjective measurements consisted of a Perceived Stress Scale (PSS) Questionnaire, Visual Analog Pain Scale (VAS) and the Vernon-Mior Neck Pain and Disability Index Questionnaire. Objective measurements consisted of pressure pain threshold algometry readings taken from active trigger points one (TP1) and/or trigger point two (TP2) on the right and/or left side of the upper trapezius muscle