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The Effects of Sling and Resistance Exercises on Muscle Activity and Pelvic Rotation Angle During Active Straight Leg Raises and Pain in Patients with Chronic Low Back Pain
J korean soc phys med 2018;13(4):113-121
Published online November 30, 2018;
© 2018 Korean Society of Physical Medicine.

Dae-Hyun Kim, PT⋅Tae-Ho Kim, PT. PhD1†

Department of Physical Therapy, College of Rehabilitation Science, Daegu University
1Department of Physical Therapy, Daegu University
Received October 5, 2018; Revised October 10, 2018; Accepted November 5, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
PURPOSE: This study was conducted to identify a more effective intervention in sling and resistance exercise for chronic low back pain patients.
METHODS: Seventy (70) subjects were randomly divided into the sling group (SG) and resistance exercise group (REG). Muscular activity of the internal oblique (IO), external oblique (EO), rectus abdominis (RA), and pelvic rotation angle during active straight leg raise (ASLR), a pressure pain threshold (PPT) and a visual analog scale (VAS) were measured. Sling and resistance exercises were conducted for 12 weeks. Intermediate measurements were taken after 8 weeks and final measurements were taken after 12 weeks.
RESULTS: Both groups showed significantly decreased RA muscle activity and significantly increased IO muscle activity (p<.05). Additionally, EO muscle activity was significantly decreased in the REG, but significantly increased in the SG (p<.05), while the pelvic rotation angle and VAS were significantly decreased in the SG (p<.05). The pressure pain threshold was significantly increased in both groups (p<.05).
CONCLUSION: Based on the results of this study, a 12-week intervention seems to be effective at improving back pain in both groups. However, a lower VAS was seen in the sling group after 8 weeks of intervention. Therefore, it is recommended that the sling be applied first when establishing a chronic back pain treatment program to shorten the treatment period and reduce the pain period.
Keywords : ASLR, EMG, Pelvic rotation angle, Resistance exercises, Sling exercises

November 2018, 13 (4)
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