Trunk muscle function and its association with functional limitations in sedentary occupation workers with and without chronic nonspecific low back pain

2021 ◽  
pp. 1-9
Author(s):  
Angela Boutellier ◽  
Corina Nüesch ◽  
Peter Suter ◽  
Guido Perrot ◽  
Annegret Mündermann
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Muscle Function ◽  
Functional Limitations ◽  
Trunk Muscle ◽  
Trunk Muscles ◽  
Low Back ◽  
Endurance Time ◽  
Large Variability ◽  
Flexion Extension

BACKGROUND: The function of trunk muscles in chronic nonspecific low back pain (CNLBP) is controversially discussed, and trunk muscle function in sedentary occupation workers is poorly understood. OBJECTIVE: To investigate whether muscle function differs between sedentary occupation workers with and without CNLBP and to determine the association between functional limitations and muscle function. METHODS: This study included 32 sedentary occupation workers (16 workers with CNLBP and 16 age- and sex-matched workers without CNLBP). Group differences in isokinetic trunk flexion-extension strength, muscle cocontraction, endurance time (Biering-Sorensen test) and electromyographic muscle fatigue were assessed. The association of these parameters and Oswestry Disability Index (ODI) score were examined in the CNLBP group. RESULTS: Participants with CNLBP had lower trunk extensor (-20%) and flexor (-18%) strength and less cocontraction (-22%) than participants without CNLBP, but due to large variability in both groups these differences were not statistically significant. Trunk muscle endurance and fatigue were comparable between groups. Variance in endurance time explained 28% of variance in the ODI-score in the CNLBP group (R2= 0.277). CONCLUSIONS: In patients with CNLBP, greater functional disability was associated with lower endurance. Further evidence is necessary to elucidate whether specifically training endurance performance may be beneficial for sedentary occupation workers.

scholarly journals Effect of Two Different Exercise Regimens on Trunk Muscle Morphometry and Endurance in Soldiers in Training

2013 ◽  
Vol 93 (9) ◽  
pp. 1211-1224 ◽  
Author(s):  
Deydre S. Teyhen ◽  
John D. Childs ◽  
Jessica L. Dugan ◽  
Alison C. Wright ◽  
Joshua A. Sorge ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Muscle Hypertrophy ◽  
Controlled Trial ◽  
Military Training ◽  
Exercise Program ◽  
Trunk Muscles ◽  
Healthy Population ◽  
Low Back ◽  
Endurance Time

BackgroundLimited evidence exists on how strength and endurance exercises commonly used to prevent low back pain affect muscle morphometry and endurance.ObjectiveThe purpose of this study was to analyze the effects of 2 exercise regimens on the morphometry and endurance of key trunk musculature in a healthy population.DesignThe study was designed as a randomized controlled trial.SettingThe study was conducted in a military training setting.ParticipantsA random subsample (n=340; 72% men, 28% women; mean [±SD] age=21.9±4.2 years; mean [±SD] body mass index=24.8±2.8 kg/m2) from the larger Prevention of Low Back Pain in the Military trial (N=4,325) was included.InterventionThe core stabilization exercise program (CSEP) included low-load/low-repetition motor control exercises, whereas the traditional exercise program (TEP) included exercises conducted at a fast pace, with the use of high-load, high-repetition trunk strengthening exercises.MeasurementsBaseline and follow-up examinations included ultrasound imaging of the trunk muscles and endurance tests. Linear mixed models were fitted to study the group and time effect and their interactions, accounting for the clustering effect.ResultsSymmetry generally improved in the rest and contracted states, but there were no differences suggestive of muscle hypertrophy or improved ability to contract the trunk muscles between soldiers receiving the CSEP or the TEP. Total trunk endurance time decreased over the 12-week period, but endurance performance favored soldiers in the CSEP group. Endurance time was not associated with future episodes of low back pain.LimitationsThe lack of morphological changes may not be detectable in an already-active cohort, or a more intensive dose was needed.ConclusionsAlthough improved symmetry was noted, neither the CSEP nor the TEP resulted in muscle hypertrophy. Longer endurance times were noted in individuals who completed the CSEP but were not strongly predictive of future low back pain episodes.

Factors associated with low back pain in air force fighter pilots: a cross-sectional study

2021 ◽  
pp. bmjmilitary-2021-001851
Author(s):  
Sâmara Raquel Alves Gomes ◽  
P R F Mendes ◽  
L D O Costa ◽  
L C C Bulhões ◽  
D T Borges ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Muscle Strength ◽  
Fatigue Resistance ◽  
Trunk Muscle ◽  
Mean Difference ◽  
High Rate ◽  
Trunk Muscles ◽  
Low Back ◽  
Cross Sectional

IntroductionLow back pain in military pilots is a frequent condition which constantly leads to absences from work, decreased concentration and performance during flight, as well as changes in work functions.MethodsThis is a cross-sectional analytical study including 28 fighter pilots who underwent an evaluation comprising muscle strength and fatigue resistance, trunk mobility and application of questionnaires to identify associated clinical factors.ResultsIt was observed that 68% of the pilots reported low back pain with an average pain intensity of 3.7 at numerical pain scale in the last week. No significant differences were observed regarding the range of motion and trunk muscle strength when pilots with low back pain were compared with asymptomatic pilots. However, lateral right trunk muscle (mean difference=16, 95% CI 0.6 to 33.0]) and lateral left trunk muscle (mean difference=22, 95% CI 1 to 44) fatigue sooner in pilots with low back pain when the two groups were compared (p=0.04 for both).ConclusionThere was a high rate of low back pain complaints among fighter pilots. There was also a significant reduction in fatigue resistance of the lateral trunk muscles in symptomatic pilots when compared with asymptomatic pilots. These factors must be considered in the physical training of this population.

scholarly journals Comparison of Trunk Muscle Activities during Pressure Feedback Monitoring among Individuals With and Without Chronic Low Back Pain

2020 ◽  
Author(s):  
Chu Huai Wang ◽  
Xin Li ◽  
Wai Leung Ambrose Lo ◽  
Song Wei Lu ◽  
Howe Liu ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Muscle Contraction ◽  
Rating Scale ◽  
Trunk Muscle ◽  
Trunk Muscles ◽  
Emg Activity ◽  
Control Group ◽  
Low Back ◽  
Pressure Feedback

Abstract Background: Pressure biofeedback unit (PBU) is a widely used non-invasive device for the monitoring of transverse abdominals (TA) and multifidus (MF) muscles in patients with low back pain (LBP). There is little research that compared trunk muscle activities with pressure feedback during trunk muscle contraction in a seated position. The aim this study was to compare muscle activities between deep local trunk muscles (TA and MF) and different target pressures (50, 60 and 70mmHg) of PBU in individuals with and without cLBP. Methods: Twenty-two patients with chronic LBP (cLBP) and 24 age matched healthy individuals were recruited. Electromyography (EMG) signals were recorded from the TA and MF muscles while the TA and MF were contracted to achieve PBU pressure value of 50, 60 and 70mmHg in random order. The average EMG amplitude (AEMG) of 3 replicate trials was used in the analysis after normalization to %MVIC. %MVIC is defined as the mean of the three AEMG divided by the AEMG of MVIC. Two-way ANOVA was performed to assess the effects of groups (Healthy and cLBP) and the three different target pressures of PBU. Spearman’s correlation analysis was performed in the cLBP group to determine potential correlations between EMG activity, NPRS and ODI. Results: The %MVIC of the TA and MF in the cLBP group were statistically higher than the control group at each pressure value (P＜0.05). The slope of the %MVIC-pressure of the cLBP subjects was significantly steeper than the healthy subjects (TA: P=0.01, MF: P＜0.001). During maximal voluntary isometric contraction (MVIC) of TA and MF, compared with pain-free group, cLBP subjects showed a decrease in EMG amplitudes (P≤0.001). The MVIC of MF was negatively correlated with Numerical Pain Rating Scale (r = -0.48, P=0.024) and Oswestry Disability Index (r = -0.59, P=0.004). Conclusions: The study demonstrated the feasibility of using PBU to assess muscle contraction that corresponds with changes of muscle activity as measured by EMG. Clinicians may be able to confer PBU measurements with EMG recordings to estimate the level of muscle activities during MF and TA contraction exercise in patients with cLBP.

Trunk muscle co-ordination during gait: Relationship between muscle function and acute low back pain

2005 ◽  
Vol 12 (4) ◽  
pp. 243-247 ◽  
Author(s):  
Christoph Anders ◽  
Hans-Christoph Scholle ◽  
Heiko Wagner ◽  
Christian Puta ◽  
Roland Grassme ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Muscle Function ◽  
Trunk Muscle ◽  
Low Back ◽  
Acute Low Back Pain
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