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Posture, muscle activity and muscle fatigue in prolonged VDT work at different screen height settings.

With the increasing use of video display terminals (VDTs), there is growing concern over the corresponding increase in the number of health problems reported. Although much research has focused on identifying the optimal screen height, there is to date no consensus. This study aimed to investigate t...

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Published in:Ergonomics Vol. 46; no. 7; pp. 714 - 715
Main Authors: Seghers J, Jochem A, Spaepen A
Format: Journal Article
Published: Taylor & Francis Ltd 6/10/2003
Online Access:View this record in EBSCOhost
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      pub: Taylor & Francis Ltd
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        atl: Posture, muscle activity and muscle fatigue in prolonged VDT work at different screen height settings.
      aug:
        au:
          Seghers J
          Jochem A
          Spaepen A
      sug:
        subj:
          Computer Terminals
          Eye Diseases Physiopathology
          Muscle Fatigue Physiology
          Muscle, Skeletal Physiology
          Posture
          Adult
          Electromyography
          Eye Diseases Etiology
          Female
          Male
          Neck Physiology
          Shoulder Physiology
          Adult: 19-44 years
          Female
          Male
      ab: With the increasing use of video display terminals (VDTs), there is growing concern over the corresponding increase in the number of health problems reported. Although much research has focused on identifying the optimal screen height, there is to date no consensus. This study aimed to investigate the effect of prolonged (89 min) VDT work at four different screen heights on head - neck posture, muscle activity and the development of muscle fatigue. The results show that lowering screen height, starting from 15 cm above the baseline (i.e. top of the screen level with eye height while sitting), decreased the ear - eye angle, increased the viewing angle, increased the viewing angle relative to the ear - eye line, and increased the muscle activity of the neck extensor muscles. There were also some significant time effects on postural angles and muscle activity. In this study there were only rare occurrences of muscle fatigue, defined as a simultaneous increase in EMG amplitude and a shift of the EMG power spectrum to lower frequencies. Muscle activity increased significantly in some muscles and for certain screen heights.
      pubtype: Academic Journal
      doctype: Journal Article
      ougenre: Article
    language: English
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