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Träfflista för sökning "WFRF:(Karlqvist Lena) "

Search: WFRF:(Karlqvist Lena)

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  • Karlqvist, Lena, et al. (author)
  • Computer mouse and track-ball operation : Similarities and differences in posture, muscular load and perceived exertion
  • 1999
  • In: International Journal of Industrial Ergonomics. - 0169-8141 .- 1872-8219. ; 23:3, s. 157-169
  • Journal article (peer-reviewed)abstract
    • Posture (optoelectronic 3D motion analysis system), muscular load (EMG), perceived exertion (rating scales), preference and productivity were investigated in 20 healthy VDU-operators (10 male and 10 female) during text editing with two different data input devices, a mouse and a track-ball. Work with the track-ball entailed lower shoulder elevation and less neck/shoulder muscle activity than work with the mouse. Arm support reduced muscle activity in the neck/shoulder region irrespective of input device used. A table height lower than 3 cm above elbow height allowed arm and shoulder support without undue shoulder elevation. Work with the track-ball entailed more wrist extension than work with the mouse. Perceived exertion ratings were lower for the shoulder and higher for the hand with track-ball than with mouse operation. Thus, biomechanical demands differ between different input devices. The women elevated and rotated their right shoulder outwards more than the men during work with both input devices. The overall EMG results showed a higher activity among the women than among the men in two of the examined muscles. This may relate to anthropometric differences which also influence biomechanical load moments. Another reason could be the observed differences in working techniques between the men and the women.
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  • Karlqvist, Lena, et al. (author)
  • Computer mouse position as a determinant of posture, muscular loadand perceived exertion
  • 1998
  • In: Scandinavian Journal of Work, Environment and Health. - : Scandinavian Journal of Work, Environment and Health. - 0355-3140 .- 1795-990X. ; 24:1, s. 62-73
  • Journal article (peer-reviewed)abstract
    • This study concerned the influence of 6 positions of the computer mouse on the work table on posture, muscular load, and perceived exertion during text editing. METHODS: An optoelectronic 3-dimensional motion analysis system was used to register the postures of 10 men and 10 women using video display units. Muscular load was also registered (with electromyography), as was perceived exertion (with rating scales). RESULTS: A neutral posture with a relaxed and supported arm showed the least perceived exertion, and the electromyographic results showed low activity in both trapezius muscles in this position. Short operators (all women) showed a numerically higher activity in the 4 examined muscles than the tall operators (all men, except 1). This finding could be related to lower muscle force among women and to anthropometric differences, which also influence biomechanic load moments. Narrow-shouldered operators (8 women and 1 man) and short operators worked with larger outward rotation and abduction of the shoulder in a position of the mouse lateral to the keyboard than the broad-shouldered (7 men and 2 women) and tall operators did. Arm support markedly reduced muscle load in the neck-shoulder region among the operators. CONCLUSIONS: The operators using video display units in this study preferred to use the mouse on a table in a close to relaxed, neutral posture of the arm in combination with arm support. Short and narrow-shouldered operators worked in more strenuous postures of the arm when the mouse was located lateral to the keyboard.
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  • Bildt, Carina, et al. (author)
  • Från matsal till matlåda : ergonomiska belastningar vid distribution av portionsförpackad varm mat
  • 2001
  • Reports (other academic/artistic)abstract
    • From dining room to lunch box: Ergonomic loads in distribution of individually portioned warm food During the last years in Sweden, distribution of warm food have been a service more commonly offered, then other forms of help, by the society to old people living at home who can't prepare their own food anymore. Organisations for this type of distribution have been built up in several Swedish municipalities. In the municipality where the present study took place, the food distributors were workin
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  • Result 1-10 of 165
Type of publication
conference paper (53)
journal article (41)
reports (36)
book chapter (28)
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doctoral thesis (2)
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book (1)
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Type of content
other academic/artistic (84)
peer-reviewed (69)
pop. science, debate, etc. (12)
Author/Editor
Karlqvist, Lena (163)
Wiktorin, Christina (38)
Winkel, Jörgen (36)
Hagberg, Mats (19)
Nygård, Clas-Håkan (17)
Bildt, Carina (16)
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Härenstam, Annika (12)
Gard, Gunvor (11)
Selin, Kristina (11)
Toomingas, Allan (10)
Isaksson, Anita (10)
Schéele, Patrik (9)
Dahlberg, Raymond (8)
Larsson, Agneta (7)
Bernmark, Eva (7)
Ericson, M. (6)
Kilbom, Åsa (6)
Bodin, Lennart (5)
Tyrkkö, Arja (5)
Ekenvall, Lena (5)
Rostö, Tommy (5)
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Fransson-Hall, Charl ... (5)
Westerberg, Mats (4)
Wiklund, Per (4)
Westberg, Hanna (4)
Nise, Gun (4)
Hjelm, Ewa Wigaeus (4)
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Gloria, Robert (4)
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Johansson, Gun (3)
Hansson, Gert-Åke (3)
Fransson, Charlotte (3)
Lindbeck, Lars (3)
Hansson, Bo (3)
Larsson, Anders (2)
Eklund, Jörgen (2)
Åkerfeldt, Torbjörn (2)
Alexanderson, Kristi ... (2)
Vingård, Eva (2)
Johansson, Kerstin (2)
Nykvist, Karin (2)
Gunningberg, Lena (2)
Fjell, Ylva (2)
Brunnberg, Hans (2)
Helmersson-Karlqvist ... (2)
Dallner, M. (2)
Dallner, Margareta (2)
Neumann, W. Patrick (2)
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University
Luleå University of Technology (157)
Karolinska Institutet (12)
University of Gothenburg (4)
Karlstad University (4)
Uppsala University (3)
Lund University (3)
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Royal Institute of Technology (2)
Mid Sweden University (2)
Örebro University (1)
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Language
English (92)
Swedish (72)
Danish (1)
Research subject (UKÄ/SCB)
Medical and Health Sciences (15)
Social Sciences (10)
Engineering and Technology (7)
Natural sciences (1)

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