The influence of positional release therapy on the myofascial tension of the upper trapezius muscle

The objective of this study was to analyze the influence of positional release therapy (PRT) on the myofascial tension of the upper trapezius muscle with an active myofascial trigger point (TrP). We studied 30 subjects (18 men and 12 women), mean age 34.5 ± 9.4 years, with an active TrP in the upper trapezius muscle on one side. A search for TrPs was performed bilaterally and the points were considered to be active when both local and referred pain evoked by manual palpation reproduced a deep aching and burning pain. The patients were evaluated under three conditions: (a) resting baseline, (b) concentric contraction and (c) isometric contraction, before and after treatment with PRT, regarding the following parameters: (i) pain intensity during manual palpation (visual analogue pain scale) and (ii) upper trapezius muscle electromyographic (EMG) signals. A significant decrease in painful symptoms from 5.3 ± 1.9 to 2.8 ± 1.8 (p