Meta-AnalysisoftheEffectsofPhysicalModalityTherapyandExerciseTherapyonNeckandShoulderMyofascialPainSyndrome

Myofascial pain syndrome (MPS) in the neck and shoulders is an increasingly common condition affecting modern workers who spend long hours in static positions. This syndrome affects 54% of adult women and 45% of men, with chronic pain reported in 50-85% of those with symptoms. Up to 55% of patients with chronic neck pain and headaches have myofascial pain syndrome as the primary cause. While individual studies have examined various physical therapy approaches for MPS, there was a need to systematically analyze the overall effectiveness of these treatments to guide evidence-based clinical practice.

The researchers conducted a comprehensive meta-analysis examining studies published between 2008 and 2019. They searched both national Korean databases (405 studies) and international databases including PubMed, Embase, and Cochrane Library (1,600 studies). After applying strict criteria, they selected 25 studies with 63 effect sizes for analysis. The studies included three main intervention types: physical modality therapy alone (like ultrasound, electrical stimulation), exercise therapy alone, and combined treatments.

They measured effectiveness using pain scales, pressure pain thresholds, and neck disability measures. The analysis used advanced statistical methods to account for differences between studies and assessed for publication bias.

Combined physical therapy and exercise showed the largest treatment effect (effect size 1.83), followed by exercise therapy alone (1.18) and physical modality therapy alone (1.13). All treatments produced large, statistically significant improvements. The most effective treatment schedules were 6-10 sessions over 16-30 days with groups of 21-40 participants. Visual analog scale pain scores showed the largest improvements (effect size 1.59), followed by neck disability index (1.35) and pressure pain threshold (0.94).

When corrected for publication bias, the overall effect size was 0.67, which still represents a meaningful medium-sized effect. The heterogeneity between studies was high (85.3%), indicating substantial variation in treatment approaches and patient populations.

This meta-analysis provides strong evidence that physical therapy modalities and exercise are effective treatments for neck and shoulder myofascial pain syndrome. Combining exercise with physical modalities appears most effective, supporting an integrated approach to treatment. The findings suggest that relatively short-term interventions (6-10 sessions) can produce meaningful pain relief. For clinicians, this supports using evidence-based physical therapy approaches for MPS patients.

For patients, it provides reassurance that conservative treatments can be highly effective for managing myofascial pain. The research also highlights the need for standardized outcome measures and longer-term follow-up studies to better understand sustained treatment benefits.