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The relationship between circadian type and physical activity as predictors of sleepiness and fatigue during simulated nightshifts: a randomised controlled trial
,
Charlotte C. Gupta ,
Grace E. Vincent ,
Corneel Vandelanotte ,
Mitch J. Duncan ,
Philip Tucker ,
Lee Di Milia ,
Sally A. Ferguson
Ergonomics, Pages: 1 - 15
Swansea University Author:
Philip Tucker
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© 2024 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (CC-BY-NC-ND 4.0).
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DOI (Published version): 10.1080/00140139.2024.2430369
Abstract
Breaks involving physical activity may provide on-shift recovery from sleepiness and fatigue during nightshifts, with effects potentially influenced by circadian type. Thirty-three adults (M ± SD age: 24.6 ± 4.8y; 55% female) participated in five laboratory nightshifts (2200–0600h) and were randomis...
| Published in: | Ergonomics |
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| ISSN: | 0014-0139 1366-5847 |
| Published: |
Informa UK Limited
2024
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa68267 |
| Abstract: |
Breaks involving physical activity may provide on-shift recovery from sleepiness and fatigue during nightshifts, with effects potentially influenced by circadian type. Thirty-three adults (M ± SD age: 24.6 ± 4.8y; 55% female) participated in five laboratory nightshifts (2200–0600h) and were randomised to sedentary (SIT; n = 14) or ‘breaking-up’ sitting (BREAK; n = 19). Participants completed the Circadian Type Inventory, categorising as rigid (n = 12) or flexible (n = 11); and languid (n = 11) or vigorous (n = 13). BREAK participants walked 3-minutes every 30-minutes at 3.2 km/h; all completed fatigue and sleepiness scales. Linear mixed models showed a 3-way interaction between nightshift (N1–N5), condition (SIT, BREAK), and rigidity-flexibility for fatigue (p<.001) and sleepiness (p<.001). Fatigue and sleepiness were greatest on N1 for SIT-Flexible and BREAK-Rigid, with SIT-Rigid experiencing the greatest levels overall. BREAK-Flexible showed no reduction. No 2-way interactions between nightshift and languidity-vigour were found. Breaking up sitting attenuated fatigue and sleepiness for rigid types only. On-shift recovery needs may differ for circadian types. |
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| Keywords: |
Shift work; night shift; cognitive performance; fatigue countermeasure; physical activity; individual difference; circadian type |
| College: |
Faculty of Medicine, Health and Life Sciences |
| Funders: |
This work was supported by the Australian Research Council [IA0802]. |
| Start Page: |
1 |
| End Page: |
15 |