Electromyographic activity of the erector spinae: The short-effect of one workday for welders with nonspecific chronic low back pain, an observational study
- 6 February 2018
- journal article
- research article
- Published by IOS Press in Journal of Back and Musculoskeletal Rehabilitation
- Vol. 31 (1), 147-154
- https://doi.org/10.3233/bmr-169733
Abstract
OBJECTIVE: This study aimed to evaluate the effect of one workday on pain and perceived exertion, muscular strength, and electromyographic activity of the erector spinae muscles in welders with and without low back pain. This is an observational cohort study. PARTICIPANTS: Twenty-two welders, metallurgical shipbuilding, were equally divided into 2 groups: low back pain and no low back pain. Pain and perceived exertion. Muscular strength by maximal voluntary contractions and electromyographic activity of right and left erector spinae muscles during maximal voluntary contractions and in the 3 welding positions for 2 periods of the workday (in the morning and at the end of the workday). RESULTS: At the end of workday, the pain increased significantly for the low back pain group (t(22) = 2.448; P = 0.023). The perceived exertion also increased significantly for both groups at the end of workday groups (F(1,22) = 8.570, P = 0.000) and periods (F(1,22) = 8.142, P = 0.000). There were no significant differences between groups and workday periods for muscular strength and electromyographic activity during maximal voluntary contractions of the erector spinae. There was no significance difference for electromyographic activity between groups and workday period and in the 3 welding positions. CONCLUSION: Although the pain and perceived exertion increased at the end of the workday, these results did not interfere in muscular strength and electromyographic activity of right and left erector spinae muscles. Thus, we can conclude that welders with chronic low back pain had a good physical capacity (muscular strength) and that muscle performance was maintained.Keywords
This publication has 39 references indexed in Scilit:
- Potential Risk Factors for New Onset of Back Pain Disability in Japanese WorkersSpine, 2012
- The prognosis of acute and persistent low-back pain: a meta-analysisCMAJ : Canadian Medical Association Journal, 2012
- Workers Who Stay at Work Despite Chronic Nonspecific Musculoskeletal Pain: Do They Differ from Workers with Sick Leave?Journal of Occupational Rehabilitation, 2012
- Systematic review: occupational physical activity and low back painOccupational Medicine, 2011
- EMG analysis of lumbar paraspinal muscles as a predictor of the risk of low-back painEuropean Spine Journal, 2010
- Systematic reviews of low back pain prognosis had variable methods and results—guidance for future prognosis reviewsJournal of Clinical Epidemiology, 2009
- Electromyographic mapping of the erector spinae muscle with varying load and during sustained contractionJournal of Electromyography and Kinesiology, 2009
- Predicting the long term course of low back pain and its consequences for sickness absence and associated work disabilityOccupational and Environmental Medicine, 2006
- Chapter 4 European guidelines for the management of chronic nonspecific low back painEuropean Spine Journal, 2006
- Chapter 3 European guidelines for the management of acute nonspecific low back pain in primary careEuropean Spine Journal, 2006