A Comparative Study Of The Effects Of Bridging Exercise With Different Pelvis Positions In The Rehabilitation Of Non-specific Low Back Pain

Objective: To compare the effect of bridging exercise with different pelvis positions in the rehabilitation of Non-specific low back pain(NSLBP)and to explain it's possible mechanism by comparing the effect of bridging exercise with different pelvis positions on the activity level of lumbar core muscles in patients with NSLBP.Methods: 36 NSLBP patients were randomly divided into A,B and C group with 12 cases in each group.The A,B and C group received 8 weeks of bridging exercise involving anterior pelvic tilting,bridging exercise involving posterior pelvic tilting and bridging exercise involving neutral pelvic tilting respectively.Before and after the training,the Visual Analogue Score(VAS),Oswestry Disability Index(ODI)and Finger And Floor Distance(FFD)were used for evaluating the training effect;Meanwhile,the Average Electromyography(AEMG)was used for evaluating the activity level of lumbar core muscles.Results: Before the intervention,there was no significant inter-group difference in any of the measurements(P>0.05).Afterward,the VAS score of all groups were decreased significantly after treatment(P<0.05);There was no significant inter-group difference in VAS difference value after treatment(P>0.05);The ODI score of all groups were decreased significantly after treatment(P<0.05);The ODI difference value in B group was significantly greater than that in the two other groups(P<0.05);The FFD value of all groups were decreased significantly after treatment(P<0.05);The FFD difference value in B group was significantly greater than that in the two other groups(P<0.05);The rectus abdominis AEMG value was increased significantly in all groups after treatment(P<0.05);The rectus abdominis AEMG difference value in B group was significantly greater than that in the two other groups(P<0.05);The external oblique AEMG value of all groups were increased after treatment(P<0.05);There was no significant inter-group difference in external oblique AEMG difference value after treatment(P>0.05);The erector spinae AEMG value of all groups were increased after treatment(P<0.05);There was no significant inter-group difference in erector spinae AEMG difference value after treatment(P>0.05).The multifidus AEMG value of all groups were increased after treatment(P<0.05);There was no significant inter-group difference in multifidus AEMG difference value after treatment(P>0.05).Conclusion:(1)Bridging exercise involving posterior pelvic tilting is more effective in the rehabilitation of NSLBP at reduce dysfunction as well as enhance the flexibility of lumbar spine.(2)The mechanism of better rehabilitation effect of bridging exercise involving posterior pelvic tilting for patients with NSLBP may be that it improves the activity level of abdominal core muscle group more effectively,thereby enhancing spinal stability more effectively.