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RESEARCH PRODUCT
Muscle Activity Adaptations to Spinal Tissue Creep in the Presence of Muscle Fatigue.
Jacques AbboudFrançois NougarouMartin Descarreauxsubject
Malemyalgialcsh:MedicineElectromyographyPathology and Laboratory MedicineMaterial Fatigue0302 clinical medicineMaterials PhysicsMedicine and Health SciencesRange of Motion Articularlcsh:ScienceMusculoskeletal SystemFatigueMultidisciplinarymedicine.diagnostic_testPhysicsClassical MechanicsAnatomyDeformationBioassays and Physiological Analysismedicine.anatomical_structureCreepMuscle FatiguePhysical SciencesMetallurgyCardiologyFemaleAnatomymedicine.symptomRange of motionAlgorithmsMuscle ElectrophysiologyMuscle ContractionResearch ArticleMuscle contractionAdultMetal FatigueMuscle tissuemedicine.medical_specialtyMaterials sciencePostureMaterials ScienceMuscle TissueResearch and Analysis MethodsYoung Adult03 medical and health sciencesSigns and SymptomsInternal medicinemedicineHumansPain ManagementMuscle SkeletalElectrodesMuscle contractureBackDamage MechanicsMuscle fatigueElectromyographyElectrophysiological Techniqueslcsh:RBiology and Life SciencesMyalgia030229 sport sciencesSpineBiological Tissuelcsh:Q030217 neurology & neurosurgerydescription
Aim The aim of this study was to identify adaptations in muscle activity distribution to spinal tissue creep in presence of muscle fatigue. Methods Twenty-three healthy participants performed a fatigue task before and after 30 minutes of passive spinal tissue deformation in flexion. Right and left erector spinae activity was recorded using large-arrays surface electromyography (EMG). To characterize muscle activity distribution, dispersion was used. During the fatigue task, EMG amplitude root mean square (RMS), median frequency and dispersion in x- and y-axis were compared before and after spinal creep. Results Important fatigue-related changes in EMG median frequency were observed during muscle fatigue. Median frequency values showed a significant main creep effect, with lower median frequency values on the left side under the creep condition (p≤0.0001). A significant main creep effect on RMS values was also observed as RMS values were higher after creep deformation on the right side (p = 0.014); a similar tendency, although not significant, was observed on the left side (p = 0.06). A significant creep effects for x-axis dispersion values was observed, with higher dispersion values following the deformation protocol on the left side (p≤0.001). Regarding y-axis dispersion values, a significant creep x fatigue interaction effect was observed on the left side (p = 0.016); a similar tendency, although not significant, was observed on the right side (p = 0.08). Conclusion Combined muscle fatigue and creep deformation of spinal tissues led to changes in muscle activity amplitude, frequency domain and distribution.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-02-11 | PLoS ONE |