Why does work cause fatigue? A real-time investigation of fatigue, and determinants of fatigue in nurses working 12-hour shifts

Johnston, Derek W.; Allan, Julia L.; Powell, Daniel J. H.; Jones, Martyn C.; Farquharson, Barbara; Bell, Cheryl; Johnston, Marie

Abstract

Background One of the striking regularities of human behavior is that a prolonged physical, cognitive, or emotional activity leads to feelings of fatigue. Fatigue could be due to (1) depletion of a finite resource of physical and/or psychological energy or (2) changes in motivation,
attention, and goal-directed effort (e.g. motivational control theory).
Purpose To contrast predictions from these two views in a real-time study of subjective fatigue in nurses while working.
Methods One hundred nurses provided 1,453 assessments over two 12-hr shifts. Nurses rated fatigue, demand, control, and reward every 90 min. Physical energy expenditure was measured objectively using Actiheart. Hypotheses were tested using multilevel models to predict
fatigue from (a) the accumulated values of physical energy expended, demand, control, and reward over the shift and (b) from distributed lag models of the same variables over the previous 90 min.
Results Virtually all participants showed increasing fatigue over the work period. This increase was slightly greater when working overnight. Fatigue was not dependent on physical energy expended nor perceived work demands. However, it was related to perceived
control over work and perceived reward associated with work.
Conclusions Findings provide little support for a resource depletion model; however, the finding that control and reward both predicted fatigue.

Citation

Johnston, D. W., Allan, J. L., Powell, D. J. H., Jones, M. C., Farquharson, B., Bell, C., & Johnston, M. (2019). Why does work cause fatigue? A real-time investigation of fatigue, and determinants of fatigue in nurses working 12-hour shifts. Annals of Behavioral Medicine, https://doi.org/10.1093/abm/kay065

• Journal Article Type: Article
• Acceptance Date: Jul 24, 2018
• Online Publication Date: Aug 16, 2018
• Publication Date: 2019-06
• Deposit Date: Oct 11, 2018
• Publicly Available Date: Aug 17, 2019
• Journal: Annals of Behavioral Medicine
• Print ISSN: 0883-6612
• Electronic ISSN: 1532-4796
• Publisher: BMC
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1093/abm/kay065
• Keywords: General Psychology; Psychiatry and Mental health
• Public URL: http://researchrepository.napier.ac.uk/Output/1280713
• Contract Date: Oct 11, 2018