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Trunk extensor muscle fatigue influences trunk muscle activities.

BACKGROUND: Trunk muscles fatigue is one of the risk factors in workplaces and daily activities. Loads would be redistributed among active and passive tissues in a non-optimal manner in fatigue conditions. Therefore, a single tissue might be overloaded with minimal loads and as a result the risk of...

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Published in:Work Vol. 51; no. 4; pp. 793 - 798
Main Authors: Hoseinpoor, Tahere Seyed, Kahrizi, Sedighe, Mobini, Bahrain
Format: pictorial research tables/charts Journal Article
Published: Sage Publications Inc. 2015
Online Access:View this record in EBSCOhost
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      vid: 51
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      pub: Sage Publications Inc.
      place: Thousand Oaks, California
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        atl: Trunk extensor muscle fatigue influences trunk muscle activities.
      aug:
        au:
          Hoseinpoor, Tahere Seyed
          Kahrizi, Sedighe
          Mobini, Bahrain
        affil: Department of Physiotherapy, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
      sug:
        subj:
          Task Performance and Analysis
          Muscle Fatigue
          Lifting
          Human
          Electromyography
          Female
          Abdominal Muscles
          Data Analysis Software
          Analysis of Variance
          Repeated Measures
          P-Value
          Female
      ab: BACKGROUND: Trunk muscles fatigue is one of the risk factors in workplaces and daily activities. Loads would be redistributed among active and passive tissues in a non-optimal manner in fatigue conditions. Therefore, a single tissue might be overloaded with minimal loads and as a result the risk of injury would increase. OBJECTIVE: The goal of this paper was to assess the electromyographic response of trunk extensor and abdominal muscles after trunk extensor muscles fatigue induced by cyclic lilting task. METHODS: This was an experimental study that twenty healthy women participated. For assessing automatic response of trunk extensor and abdominal muscles before and after the fatigue task, electromyographic activities of 6 muscles: thorasic erector spine (TES), lumbar erector spine (LES), lumbar multifidus (LMF), transverse abdominis/ internal oblique (TrA/IO), rectus abdominis (RA) and external oblique (EO) were recorded in standing position with no load and symmetric axial loads equal to 25% of their body weights. RESULTS: Statistical analysis showed that all the abdominal muscles activity decreased with axial loads after performing fatigue task but trunk extensor activity remained constant. CONCLUSIONS: Results of the current study indicated that muscle recruitment strategies changed with muscle fatigue and load bearing, therefore risks of tissue injury may increase in fatigue conditions.
      pubtype: Academic Journal
      doctype:
        pictorial
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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