European Journal of Applied Physiology

, Volume 104, Issue 6, pp 983–989 | Cite as

The influence of biofeedback training on trapezius activity and rest during occupational computer work: a randomized controlled trial

  • A. Holtermann
  • K. Søgaard
  • H. Christensen
  • B. Dahl
  • A. K. Blangsted
Original Article


The aim of this study was to investigate effects of biofeedback training on trapezius activity and rest (gaps) during occupational computer work. A randomized controlled trial with 164 computer workers was performed. Two groups working with computer mouse more than 50% (n = 64) and less than 25% (n = 49) of their work time performed five sessions with unilateral electromyographical (EMG) biofeedback from the dominant trapezius during computer work. A third group working with computer mouse more than 50% of their work time (n = 51) served as controls. Bipolar EMG from the bilateral upper trapezius muscles during normal computer work was recorded. Changes in discomfort/pain were not recorded. The biofeedback training reduced activity (P < 0.05), and increased the frequency of short (P < 0.05) and long (P < 0.05) gaps, and the relative rest time (P < 0.05) of the trapezius during computer work. By improving trapezius inactivity during computer work, biofeedback training may have the potential to prevent trapezius myalgia in computer workers.


Biofeedback Trapezius Computer work Occupational Randomized controlled trial 


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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • A. Holtermann
    • 1
  • K. Søgaard
    • 2
  • H. Christensen
    • 3
  • B. Dahl
    • 4
  • A. K. Blangsted
    • 1
  1. 1.National Research Centre for the Working EnvironmentCopenhagen ØDenmark
  2. 2.Institute of Sports Science and Clinical BiomechanicsUniversity of Southern DenmarkOdenseDenmark
  3. 3.Grontmij CarlbroGlostrupDenmark
  4. 4.Bente Dahl Ergonomic ConsultancyCopenhagenDenmark

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