Characterization of the dynamics of sitting during a sustained and mentally demanding computer task

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Resumé

This laboratory study studied the dynamics of sitting during a sustained and mentally demanding computer task. Mental fatigue ratings, overall performance and kinetic were recorded in 20 asymptomatic computer users performing computer work for 40 min divided in 12 time epochs. The displacement of the center of pressure (COP) in anterior-posterior (AP) and medial-lateral (ML) directions was calculated. The average, standard deviation, and sample entropy values were computed from the COP time series to assess respectively, the magnitude, size and complexity of sitting dynamics. Fatigue ratings significantly increased from before to after the computer task while the overall performance did not change significantly over time. Likewise, the direction of displacement of the COP did not affect significantly the AVG but resulted in larger SD and SaEn values in the ML direction compared with AP direction. Time did not play a significant role on any of the outcome measures. The present study demonstrated that the sitting dynamics can be assessed in an ecological environment, e.g. in office chairs. Further, we found that 40 min seated computer work did not changed the dynamics of sitting. On the contrary, we observed increased size and structure of variability in the ML than the AP direction. This latter finding can be used to design office chairs or interventions aiming at preventing discomfort due to long time sitting.

OriginalsprogEngelsk
TitelProceedings of the 20th Congress of the International Ergonomics Association, IEA 2018 : Volume VII: Ergonomics in Design, Design for All, Activity Theories for Work Analysis and Design, Affective Design
RedaktørerSebastiano Bagnara, Riccardo Tartaglia, Sara Albolino, Thomas Alexander, Yushi Fujita
Antal sider7
ForlagSpringer
Publikationsdato1 jan. 2019
Sider338-344
ISBN (Trykt)978-3-319-96070-8
ISBN (Elektronisk)978-3-319-96071-5
DOI
StatusUdgivet - 1 jan. 2019
Begivenhed20th Congress of the International Ergonomics Association, IEA 2018 - Florence, Italien
Varighed: 26 aug. 201830 aug. 2018

Konference

Konference20th Congress of the International Ergonomics Association, IEA 2018
LandItalien
ByFlorence
Periode26/08/201830/08/2018
NavnAdvances in Intelligent Systems and Computing
Vol/bind824
ISSN2194-5357

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Pressure
Mental Fatigue
Entropy
Fatigue
Outcome Assessment (Health Care)
Direction compound

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    Madeleine, P., Marandi, R. Z., Norheim, K. L., Vuillerme, N., & Samani, A. (2019). Characterization of the dynamics of sitting during a sustained and mentally demanding computer task. I S. Bagnara, R. Tartaglia, S. Albolino, T. Alexander, & Y. Fujita (red.), Proceedings of the 20th Congress of the International Ergonomics Association, IEA 2018: Volume VII: Ergonomics in Design, Design for All, Activity Theories for Work Analysis and Design, Affective Design (s. 338-344). Springer. Advances in Intelligent Systems and Computing, Bind. 824 https://doi.org/10.1007/978-3-319-96071-5_36
    Madeleine, Pascal ; Marandi, Ramtin Zargari ; Norheim, Kristoffer Larsen ; Vuillerme, Nicolas ; Samani, Afshin. / Characterization of the dynamics of sitting during a sustained and mentally demanding computer task. Proceedings of the 20th Congress of the International Ergonomics Association, IEA 2018: Volume VII: Ergonomics in Design, Design for All, Activity Theories for Work Analysis and Design, Affective Design. red. / Sebastiano Bagnara ; Riccardo Tartaglia ; Sara Albolino ; Thomas Alexander ; Yushi Fujita. Springer, 2019. s. 338-344 (Advances in Intelligent Systems and Computing, Bind 824).
    @inproceedings{3256bea79d43456ba9fae4f92d220306,
    title = "Characterization of the dynamics of sitting during a sustained and mentally demanding computer task",
    abstract = "This laboratory study studied the dynamics of sitting during a sustained and mentally demanding computer task. Mental fatigue ratings, overall performance and kinetic were recorded in 20 asymptomatic computer users performing computer work for 40 min divided in 12 time epochs. The displacement of the center of pressure (COP) in anterior-posterior (AP) and medial-lateral (ML) directions was calculated. The average, standard deviation, and sample entropy values were computed from the COP time series to assess respectively, the magnitude, size and complexity of sitting dynamics. Fatigue ratings significantly increased from before to after the computer task while the overall performance did not change significantly over time. Likewise, the direction of displacement of the COP did not affect significantly the AVG but resulted in larger SD and SaEn values in the ML direction compared with AP direction. Time did not play a significant role on any of the outcome measures. The present study demonstrated that the sitting dynamics can be assessed in an ecological environment, e.g. in office chairs. Further, we found that 40 min seated computer work did not changed the dynamics of sitting. On the contrary, we observed increased size and structure of variability in the ML than the AP direction. This latter finding can be used to design office chairs or interventions aiming at preventing discomfort due to long time sitting.",
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    Madeleine, P, Marandi, RZ, Norheim, KL, Vuillerme, N & Samani, A 2019, Characterization of the dynamics of sitting during a sustained and mentally demanding computer task. i S Bagnara, R Tartaglia, S Albolino, T Alexander & Y Fujita (red), Proceedings of the 20th Congress of the International Ergonomics Association, IEA 2018: Volume VII: Ergonomics in Design, Design for All, Activity Theories for Work Analysis and Design, Affective Design. Springer, Advances in Intelligent Systems and Computing, bind 824, s. 338-344, 20th Congress of the International Ergonomics Association, IEA 2018, Florence, Italien, 26/08/2018. https://doi.org/10.1007/978-3-319-96071-5_36

    Characterization of the dynamics of sitting during a sustained and mentally demanding computer task. / Madeleine, Pascal; Marandi, Ramtin Zargari; Norheim, Kristoffer Larsen; Vuillerme, Nicolas; Samani, Afshin.

    Proceedings of the 20th Congress of the International Ergonomics Association, IEA 2018: Volume VII: Ergonomics in Design, Design for All, Activity Theories for Work Analysis and Design, Affective Design. red. / Sebastiano Bagnara; Riccardo Tartaglia; Sara Albolino; Thomas Alexander; Yushi Fujita. Springer, 2019. s. 338-344.

    Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

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    Madeleine P, Marandi RZ, Norheim KL, Vuillerme N, Samani A. Characterization of the dynamics of sitting during a sustained and mentally demanding computer task. I Bagnara S, Tartaglia R, Albolino S, Alexander T, Fujita Y, red., Proceedings of the 20th Congress of the International Ergonomics Association, IEA 2018: Volume VII: Ergonomics in Design, Design for All, Activity Theories for Work Analysis and Design, Affective Design. Springer. 2019. s. 338-344. (Advances in Intelligent Systems and Computing, Bind 824). https://doi.org/10.1007/978-3-319-96071-5_36