Format

Send to

Choose Destination
Appl Ergon. 2019 Feb;75:120-128. doi: 10.1016/j.apergo.2018.09.012. Epub 2018 Oct 3.

Variation in upper extremity, neck and trunk postures when performing computer work at a sit-stand station.

Author information

1
Laboratory of Clinical and Occupational Kinesiology, Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luiz, Km 235, SP310, 13565-905, São Carlos, Brazil. Electronic address: dechristian_fb@live.co.uk.
2
Department of Industrial and Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, United States. Electronic address: sdivya1@vt.edu.
3
Centre for Musculoskeletal Research, Department of Occupational and Public Health Sciences, University of Gävle, SE - 801 76, Gävle, Sweden. Electronic address: svenderik.mathiassen@hig.se.
4
Laboratory of Clinical and Occupational Kinesiology, Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luiz, Km 235, SP310, 13565-905, São Carlos, Brazil. Electronic address: biaoliveira@ufscar.br.

Abstract

Sit-stand tables are introduced in offices to increase variation in gross body posture, but the extent to which upper body posture variation is also affected has not previously been addressed. Neck, trunk, and upper arm postures (means and minute-to-minute variances) were determined during periods of sitting and standing from 24 office workers using sit-stand tables to perform computer work. Posture variability resulting from different temporal compositions of sitting and standing computer work was then predicted for the neck, trunk and upper arm by simulations. Postural variability during computer work could be increased up to three-fold when 20-60% of the work was performed standing (i.e. 40-80% performed sitting), compared to performing computer work only sitting. The exact composition of sit-stand proportions leading to maximum variability, as well as the potential size of the increase in variability, differed considerably between workers. Guidelines for sit-stand table use should note these large inter-individual differences.

KEYWORDS:

Adjustable table; Job variance ratio (JVR); Office work; Posture variation; Sedentary behaviors

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center