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Activity in neck-shoulder and lower arm muscles during computer and smartphone work
Karolinska Inst, Inst Environm Med, Unit Occupat Med, S-17177 Stockholm, Sweden.;Ctr Occupat & Environm Med, Solnavagen 4, S-11365 Stockholm, Region Stockhol, Sweden..
Ctr Occupat & Environm Med, Solnavagen 4, S-11365 Stockholm, Region Stockhol, Sweden..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Biomedical Engineering and Health Systems, Ergonomics.ORCID iD: 0000-0001-5777-4232
2019 (English)In: International Journal of Industrial Ergonomics, ISSN 0169-8141, E-ISSN 1872-8219, Vol. 74, article id UNSP 102870Article in journal (Refereed) Published
Abstract [en]

Relevance to industry: There is emerging evidence of musculoskeletal problems related to smartphone work and a rapid transition to mobile workplaces, where smartphones are key working tools. Aim: The study's aim was to compare muscle activity during computer work with smartphone work and to see what possible effects ergonomic recommendations for smartphone usage have on muscle activity. Methods: Activity was measured bilaterally from the upper trapezius muscle and from lower arm muscles on the right hand side, on twelve participants with surface electromyography who performed e-mail work on the computer using ergonomic recommendations, smartphone in a self-chosen way of working and on smartphone with ergonomic recommendations. Effects on productivity was not assessed in this study. Results: Activity in m. trapezius and m. extensor digitorum was significantly higher during computer work (p < 0.05) than during the two smartphone usages and activity in m. interossei dorsalis 1 was, vice versa, significantly higher during smartphone work fp < 0.05). Comparison of smartphone in self-chosen way of working and smartphone with ergonomic recommendations showed no significant differences. Conclusions: Previous research has highlighted the benefits of variation of work postures. This paper indicates that replacing the computer with a smartphone gives the trapezius muscle an opportunity to rest.

Place, publisher, year, edition, pages
ELSEVIER , 2019. Vol. 74, article id UNSP 102870
Keywords [en]
Smartphone, Electromyography, Ergonomic recommendations
National Category
Occupational Health and Environmental Health
Identifiers
URN: urn:nbn:se:kth:diva-266421DOI: 10.1016/j.ergon.2019.102870ISI: 000503086000020Scopus ID: 2-s2.0-85074006004OAI: oai:DiVA.org:kth-266421DiVA, id: diva2:1387969
Note

QC 20200123

Available from: 2020-01-23 Created: 2020-01-23 Last updated: 2020-01-23Bibliographically approved

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Forsman, Mikael

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