Characterization of cashier shoulder and low back muscle demands

Jacquelyn M. Maciukiewicz, Angelica E. Lang, Meghan E. Vidt, Sylvain G. Grenier, Clark R. Dickerson

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Cashiers commonly report musculoskeletal discomfort in their shoulders, neck, and low back. This may result from excessive loading, awkward postures, insufficient rest, or task repetition. Recently, widespread introduction of reusable, consumer-supplied bags has introduced challenges in assessing exposures in this occupational group. Limited information exists on the physical demands associated with cashier work, particularly in the context of multiple bagging formats; this study was thus designed to generate a novel data set describing standard grocery packaging tasks. Twenty-five experienced cashiers completed 36 grocery packaging tasks consisting of twice performing all combinations of workload intensity (6, 20 items), workstation height (low, medium, high), and packaging type (plastic bags, reusable bags, bins). Surface electromyography (EMG) was measured bilaterally for 5 shoulder and 3 low back muscles and processed to generate integrated muscle demand for each combination evaluated. A mixed effect ANOVA was used to assess the influences of gender, intensity, package type, side, (muscles on the right or left side of the body) and workstation height on individual and total muscular demands. High workload intensity combined with several other factors to increase muscle demands, including using plastic or reusable bags for packaging and increasing workstation height. Gender and side also interacted with workload intensity to influence muscle activity. Encouraging rest breaks, the use of bins for packaging, and decreasing cashier workstation height may help reduce potentially injurious muscular effort for cashiers.

Original languageEnglish (US)
Pages (from-to)80-91
Number of pages12
JournalInternational Journal of Industrial Ergonomics
Volume59
DOIs
StatePublished - May 1 2017

Fingerprint

Back Muscles
workstation
Product Packaging
Muscle
Packaging
workload
Workload
Muscles
Bins
Plastics
occupational group
gender
Electromyography
Occupational Groups
Body Height
Analysis of variance (ANOVA)
Posture
Analysis of Variance
Neck
demand

Keywords

  • Cashier
  • Electromyography
  • Ergonomics
  • Low back
  • Muscle
  • Shoulder

ASJC Scopus subject areas

  • Human Factors and Ergonomics
  • Public Health, Environmental and Occupational Health

Cite this

Maciukiewicz, J. M., Lang, A. E., Vidt, M. E., Grenier, S. G., & Dickerson, C. R. (2017). Characterization of cashier shoulder and low back muscle demands. International Journal of Industrial Ergonomics, 59, 80-91. https://doi.org/10.1016/j.ergon.2017.03.004

Characterization of cashier shoulder and low back muscle demands. / Maciukiewicz, Jacquelyn M.; Lang, Angelica E.; Vidt, Meghan E.; Grenier, Sylvain G.; Dickerson, Clark R.

In: International Journal of Industrial Ergonomics, Vol. 59, 01.05.2017, p. 80-91.

Research output: Contribution to journalArticle

Maciukiewicz, Jacquelyn M. ; Lang, Angelica E. ; Vidt, Meghan E. ; Grenier, Sylvain G. ; Dickerson, Clark R. / Characterization of cashier shoulder and low back muscle demands. In: International Journal of Industrial Ergonomics. 2017 ; Vol. 59. pp. 80-91.
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