Restricted accessResearch articleFirst published online 2018-1
Electromyographic activity of the erector spinae: The short-effect of one workday for welders with nonspecific chronic low back pain,an observational study
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; 0.023). The perceived exertion also increased significantly for both groups at the end of workday groups (F(1,22) 8.570, 0.000) and periods (F(1,22) 8.142, 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.
HoyDBainCWilliamsGMarchL, et al. A systematic review of the global prevalence of low back pain. Arthritis Rheum2012 Jun; 64: 2028-37.
2.
VosT, et al. Global, regional, and national incidence, prevalence, and years lived with disability for 301 acute and chronic diseases and injuries in 188 countries, 1990-2013: A systematic analysis for the Global Burden of Disease Study 2013. The Lacet2015; 386: 743-800.
3.
GovinduNKBabski-ReevesK. Effects of personal, psychosocial and occupational factors on low back pain severity in workers. Int J Ind Ergon2014 March; 44: 335-341.
4.
DriscollTJacklynGOrchardJ, et al. The global burden of occupationally related low back pain: Estimates from the Global Burden of Disease 2010 study. Ann Rheum Dis2014; 73: 975-81.
5.
MatsudairaKKonishiHMiyoshiKIsomuraT, et al. Potential risk factors for new onset of back pain disability in Japanese workers: Findings from the Japan epidemiological research of occupation-related back pain study. Spine2012; 37: 1324-33.
6.
SilvaCBarrosCCunhaLCarnideFSantosM. Prevalence of back pain problems in relation to occupational group. Int J Ind Ergon2016; 52: 52-58.
7.
KwonBKRoffeyDMBishopPBDagenaisS, et al. Systematic review: Occupational physical activity and low back pain. Occup Med2011; 61: 541-8.
8.
BurdorfAJansenJP. Predicting the long term course of low back pain and its consequences for sickness absence and associated work disability. Occup Environ Med2006; 63(8): 522-9.
9.
ChungaMKLeebIKeecD. Effect of stool height and holding time on postural load of squatting postures. Int J Ind Ergon2003; 32: 309-317.
10.
LoweBDWurzelbacherSJShulmanSAHudockSD. Electromyographic and discomfort analysis of confined-space shipyard welding processes. Appl Ergon2001; 32: 255-269.
11.
VieiraERKumarS. Occupational risks factors identified and interventions suggested by welders and computer numeric control workers to control low back disorders in two steel companies. Int J Ind Ergon2007; 37: 553-561.
12.
FethkeNBGantLCGerrF. Comparison of biomechanical loading during use of conventional stud welding equipment and an alternate system. Appl Ergon2011; 42: 725-734.
13.
FergusonSAAllreadWGBurrDLHeaneyC, et al. Biomechanical, psychosocial and individual risk factors predicting low back functional impairment among furniture distribution employees. Clin Biomech2012; 27(2): 117-23.
14.
RegerSIShahAAdamsTCEndrediJ, et al. Classification of large array surface myoelectric potentials from subjects with and without low back pain. J Electromyogr Kinesiol2006; 16: 392-401.
15.
van DammeBStevensVPerneelCVan TiggelenD, et al. A surface electromyography based objective method to identify patients with nonspecific chronic low back pain, presenting a flexion related movement control impairment. J Electromyogr Kinesiol2014; 24(6): 954-964.
16.
GeisserMERanavayaMHaigAJRothRS, et al. A meta-analytic review of surface electromyography among persons with low back pain and normal, healthy controls. J Pain2005; 6(11): 711-26.
17.
HeydariANargolAVFJonesAPCHumphreyAR, et al. EMG analysis of lumbar paraspinal muscles as a predictor of the risk of low-back pain. Eur Spine J2010; 19: 1145-1152.
18.
HuYKwokJWTseJYLukKD. Time-varying surface electromyography topography as a prognostic tool for chronic low back pain rehabilitation. Spine2014; 14(6): 1049-56.
19.
HaydenJAChouRHogg-JohnsonSBombardierC. Systematic reviews of low back pain prognosis had variable methods and results: Guidance for future prognosis reviews. J Clin Epidemiol2009 Aug; 62(8): 781-796.
20.
da C Menezes CostaLMaherCGHancockMJMcAuleyJH, et al. The prognosis of acute and persistent low-back pain: A meta-analysis. Can Med Assoc J2012 Aug 7; 184(11): E613-24.
21.
SoerR, de VriesHJBrouwerSGroothoffJWGeertzenJHRenemanMF. Do workers with chronic nonspecific musculoskeletal pain, with and without sick leave, have lower functional capacity compared with healthy workers? Arch Phys Med Rehabil2012; Dec; 93(12): 2216-22.
22.
BousemaEJVerbuntJASeelenHAVlaeyenJWKnottnerusJA. Disuse and physical deconditioning in the first year after the onset of back pain. Pain2007; 130: 279-86.
23.
De VriesHJRenemanMFGroothoffJWGeertzenJHBBrouwerS. Workers Who stay at work despite chronic nonspecific musculoskeletal pain: Do they differ from workers with sick leave? Journal of Occupational Rehabilitation2012; 22(4): 489-502. doi: 10.1007/s10926-012-9360-6.
24.
LinCWMcAuleyJHMacedoLBarnettDC, et al. Relationship between physical activity and disability in low back pain: A systematic review and meta-analysis. J Pain2011; 152(3): 607-13.
25.
AiraksinenOBroxJICedraschiCHildebrandtJ, et al. COST B13 Working group on guidelines for chronic low back pain. Eur Spine J2006 Mar; 15(Suppl 2): S192-300.
26.
FlorindoAA. Latorre MRDO: Validation and reliability of the Baecke questionnaire for the evaluation of habitual physical activity in adult men. Rev Bras Med Esporte2003; 9: 121-12827.
27.
ColuciMAlexandreNRosecranceJ. Reliability and validity of an ergonomics-related job factors questionnaire. Int J Ind Ergon2009; 39: 995-1001.
28.
ComperMLCPadulaRS. Ergonomic risk assessment in textile industry workers by two instruments: Quick exposure check and job factors questionnaire. Fisioter Pesq2013; 20: 215-21.
29.
MoriguchiCSAlemMERVeldhovenMV, et al. Cultural adaptation and psychometric properties of Brazilian Need for Recovery Scale. Rev Saude Publica2010; 44: 131-9.
30.
de VetHCHeymansMWDunnKMPopeDP, et al. Episodes of low back pain: A proposal for uniform definitions to be used in research. Spine2002; 27(21): 2409-16.
31.
BurtonAKBalaguéFCardonGEriksenHR, et al. European guidelines for prevention in low back pain. Eur Spine J200615(Suppl 2): S136-S168.
32.
KamperSJMaherCGKoesBWCroftPR, et al. Treatment-based subgroups of low back pain: A guide to appraisal of research studies and a summary of current evidence. Best Pract Res Cl Rh2010 Apr; 24(2): 181-91.
33.
van TulderMBeckerABekkeringTBreenA, et al. European guidelines for the management of acute nonspecific low back pain in primary care. Eur Spine J2006; 15(Suppl 2): S169-S191.
34.
WatariRSartorCDPiconAPButuganMKAmorimCFOrtegaNR, et al. Effect of diabetic neuropathy severity classified by a fuzzy model in muscle dynamics during gait. J Neuroeng Rehabil2014; 11(1): 1.
35.
Surface ElectroMyoGraphy for the Non-Invasive Assessment of Muscles (SENIAM). Avaiable in www.seniam.org. Accessed in 20/09/2012.
36.
BorgGA. Psychophysical bases of perceived exertion. Med Sci Spor Exer1982; 14: 377-381.
37.
MorishitaSYamauchiSFujisawaCKazuhisaD. Rating of perceived exertion for quantification of the intensity of resistance exercise. Int J Phys Med Rehabil2013; 1(9): 172.
38.
WidanarkoBLeggSStevensonMDevereuxJ, et al. Prevalence and work-related risk factors for reduced activities and absenteeism due to low back symptoms. Appl Ergon2012; 43: 727-737.
39.
TuckerKFallaDGraven-NielsenTFarinaD. Electromyographic mapping of the erector spinae muscle with varying load and during sustained contraction. J Electromyogr Kinesiol2009; 19: 373-379.
40.
DahmKTBrurbergKGJamtvedtGHagenKB. Advice to rest in bed versus advice to stay active for acute low-back pain and sciatica. Cochrane Database Syst Rev2010; 16(6).
41.
PadulaRSCarregaroLRMeloBSilvaC. Low Back pain disability and stay at work: Contradiction or necessity? Work2012; 41: 2417-2419.
42.
NassifHBrossetNGuillaumeMDelore-MillesETaffletMBuchholzFToussaintJF. Evaluation of a randomized controlled trial in the management of chronic lower back pain in a French automotive industry: An observational study. Arch Phys Med Rehabil2011 Dec; 92(12): 1927-1936.
