Evaluation of Lumbar Myofascial Release Effects on Lumbar Flexion Angle and Pelvic Inclination Angle in Patients with Non-Specific Low Back Pain

BACKGROUND: Many studies have shown that changes in lumbar flexion angle and the pelvic inclination angle can be affected by the shortening of the lumbar muscles, which can cause low back pain. Decreased lumbar flexion angle and pelvic inclination angle can cause or exacerbate low back pain by disrupting the lumbo-pelvic rhythm. PURPOSE: This study aimed to use myofascial release techniques as a specialized treatment on muscle tissue to cause muscles to reach the optimal length and improve lumbar flexion angle and pelvic inclination angle, and thus improve low-back pain. SETTING: Non-specific low back pain patients, Tarbiat Modares University, Iran. PARTICIPANTS: 30 chronic non-specific low back pain participants were randomly assigned into two groups. RESEARCH DESIGN: This is a randomized control trial. INTERVENTIONS: The myofascial release group (n=15) underwent 4 sessions of myofascial release treatment based on Myer’s techniques, and the control group (n=15) underwent 10 sessions of routine electrotherapy for two weeks. MAIN OUTCOME MEASURES: Before starting the intervention and after the last treatment session, both groups were evaluated by the lumbar flexion angle with a flexible ruler, calculating the pelvic inclination angle by a trigonometric formula, and VAS measured the pain score of the participants. RESULTS: The results of the paired t test showed that, after treatment in both groups, the severity of pain and lumbar flexion angle changed significantly (p ≤ .001). However, the pelvic inclination angle was changed considerably only in the myofascial release group, and we did not see significant changes in the control group (p = .082). Also, the independent sample t test results to examine the between-group changes showed that changes in the myofascial release group were significantly different from the control group (p ≤ .000). Also, the effect size shows the large effect of the myofascial release technique compared to the control group (effect size ≥ 1.85). CONCLUSION: The present study results showed that myofascial release techniques in patients with low back pain could help decrease pain intensity and increase lumbar flexion and pelvic inclination angle. Based on the present study results, myofascial release can be a treatment to correct posture in patients with chronic non-specific, low back pain. Due to the prevalence of the COVID-19 pandemic, it was not possible to evaluate the long-term effects of treatment.