Effects of Thoracolumbar Fascia Myofascial Release in Chronic Low Back Pain

The thoracolumbar fascia (TLF) is thickened and stiffer in individuals with chronic non-specific low back pain (CNSLBP) and may contribute to pain persistence. Myofascial release (MFR) has been shown to reduce TLF stiffness acutely; however, its longer-term effects on fascial morphology and pain self-efficacy remain unclear. This randomized controlled trial will investigate the effects of a standardized 6-week MFR program targeting the thoracolumbar fascia compared with sham MFR in adults with CNSLBP. A total of 65 participants aged 18-60 years with CNSLBP will be randomized in a 1:1 ratio to either standardized MFR or sham MFR. The intervention will consist of 18 treatment sessions delivered over 6 weeks. Primary outcomes include thoracolumbar fascia thickness measured by B-mode ultrasound, thoracolumbar fascia stiffness measured by shear-wave elastography, and pain self-efficacy measured using the Pain Self-Efficacy Questionnaire (PSEQ). Secondary outcomes include pain intensity, functional disability, lumbar flexion range of motion, and patient global impression of change. Outcomes will be assessed at baseline and after completion of the 6-week intervention period.