RESUMEN
BACKGROUND: The most important clinical problem in myofascial pain syndrome (MPS) is trigger points (TrPs). The aim of the present study was to investigate the comparison of immediate effect of deep transverse friction massage (DTFM), high-power pain threshold ultrasound (HPPTUS), and whole body vibration (WBV) on treatment of active myofascial trigger points (MTrPs). MATERIALS AND METHODS: sixty six men with active TrPs of upper trapezius muscle were randomly divided into three equal groups: DTFM, HPPT US, and WBV. Pain intensity based on the Visual Analogue Scale (VAS), pressure pain threshold (PPT) and active contralateral lateral flexion range of motion (CLF ROM) of the neck were evaluated before and immediately after the interventions. RESULTS: The VAS, PPT and the active CLF ROM were substantially improved after intervention in all groups (P < 0.01). When the three groups were compared regarding VAS, participants in the WBV group reported significantly more reduction in pain (P < 0.01). On comparing the interventions, there were no significant differences in PPT values (P > 0.05). The CLF ROM value in HPPTUS and WBV groups have significant increase in comparison to the DTFM group. CONCLUSION: All three interventions can improve neck pain, PPT and ROM in participants with active TrPs in upper trapezius muscle, but due to the fact that the DTFM has more pressure on therapist fingers, and the HPPTUS technique requires proper interaction with the participants, WBV can be used as one of the effective intervention on active MTrPs of upper trapezius. CLINICAL TRIAL REGISTRATION NUMBER: IRCT20200518047498N1.