Efficacy Observation Of Self-Myofascial Release On Patients With Chronic Non-Specific Low Back Pain

Background and Objective:Self-myofascial release(SMFR)is a self-intervention based on the application of pressure to soft tissues using foam roller and other small hand-held tools.The stretch of time solves the dysfunction of skeletal muscle and connective tissue to reduce pain and improve function.However,the etiology of chronic non-specific low back pain is complex,and there are few studies on self-myofascial release in clinical for lower back pain.This study collects the sEMG signals of the erector spinae muscles and multifidus muscles of patients,and explores the therapeutic effect of self-myofascial release on patients with chronic non-specific low back pain.It provides new ideas for the treatment of patients with chronic non-specific low back pain and verification with science.Methods:Based on Gpower’s analysis and calculation of relevant factors,it was found that 34 patients with chronic non-specific low back pain were required for this experiment.17 male and female subjects with low back pain over 12 weeks and not in the acute phase were selected through the exclusion criteria.They were randomly divided into intervention group(9 males and 9 females)and control group(8 males and 8 females)for two weeks of exercise intervention.Before the test,all subjects completed the basic information of the subject,the Oswestry Dysfunction Index Questionnaire,the visual analogue scale and the Chinese Version of the Roland-Morris Disability Questionnaire.In the intervention group,foam roller was used for self-myofascial release and in the control group,Swiss ball was used for core muscle training.Before the intervention,immediately after the intervention and after two weeks of exercise intervention,the two groups were subjected to a questionnaire survey and flexion extension test.The EMG was collected using a Delays EMGWorks(Boston,MA,USA)electromyograph,and the surface electrodes were attached to(1)the vertical spine Muscle: placed 3cm away from the spinous process of L3;(2)Multifidus muscle: placed 2cm away from the spinous process of L5;(3)3D accelerometer was placed at the spinous process of T12 and S1 to measure the trunk and pelvic angle;Use the instrument’s own software EMGworks to analyze the sEMG signal and select the following indicators:(1)the maximum angle of lumbar flexion;(2)the vertical spinal muscle EMG-off during the flexion of the lumbar spine(When the signal disappears),and the EMG-on of the erector spinae muscle during extension(that is,the angle of the lumbar spine when the subject’s sEMG signal appears during extension);(3)the flexion-extension ratio of the erector spinae and multifidus muscles(Flexion-extension ratios,FER): The ratio of flexion-extension(EXT / MVF)during extension,that is,the ratio of the maximum electromyographic value of the erector spinae to the average electromyography of the lumbar spine at the maximum flexion position during extension;flexion-extension ratio at time(FLEX / MVF,I.e.the maximum sEMG(the FLEX)and lumbar vertebrae and the lumbar spine occurs during the ratio of the average EMG at maximum flexion position.The electromyographic index and subjective assessment of the patient’s own pain were used to evaluate the effect of myofascial release on patients with chronic non-specific low back pain Result:(1)Compared with before the intervention,the patients in the intervention group had significantly lower VAS scores and CRMDQ scores before and after the intervention(P<0.05).(2)Comparison of joint mobility,flexion-extension ratio,erector spinal muscle EMG-off during flexion and erector spinal muscle EMG-on during extension before and after intervention for two groups.There was no significant difference between the group and the control group(P> 0.05).(3)The flexion-extension ratio(EXT / MVF)and flexion-extension ratio(FLEX / MVF)of flexion and extension of the erector spinae and multifidus muscles in the two groups of patients before and after intervention had significant differences(P <0.05).Conclusions:Self-myofascial release for patients with chronic non-specific low back pain can alleviate low back pain and improve the mobility of lumbar joints.