PMID: 8943832Oct 1, 1996Paper

Rescheduling a three shift system at a steel rolling mill: effects of a one hour delay of shift starting times on sleep and alertness in younger and older workers

Occupational and Environmental Medicine
R R RosaO Näsman

Abstract

To evaluate a new work schedule at a Finnish steel mill with special attention to effects on older workers. The schedule was designed to improve sleep before the morning shift, and alertness during the morning shift, by delaying shift start and end times. Evaluation was by a shiftwork health and safety questionnaire, recordings of work-rest-sleep cycles with activity monitors worn on the wrist, daily diaries, and on site computerised testing of fatigue and alertness by the NIOSH fatigue test battery. The one hour delay in shift starting times improved sleep before the morning shift, and improved waking fatigue, sleepiness, and performance during the morning shift. Evening and night shift sleep and fatigue or sleepiness, however, were affected negatively by the new work schedule, but the results for those shifts were less consistent across the various measures. Despite the improvements, most workers were not satisfied with the new schedule because of social concerns. Few interactions of age with the new work schedule were found, suggesting that the effects of the work schedule were uniform across age groups. A change of as little as one hour in shift starting times can improve morning shift sleep and alertness, but there are tra...Continue Reading

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Citations

Sep 5, 2009·European Journal of Applied Physiology·Ingo FietzeThomas Penzel
Mar 11, 2011·Ergonomics·M M Blok, M P de Looze
Nov 30, 1999·Experimental Aging Research·O Näsman, J Ilmarinen
Apr 1, 2006·The American Journal of Nursing·Alison TrinkoffCarles Muntaner
Aug 17, 1999·Occupational and Environmental Medicine·P TuckerS Folkard
Jul 7, 2009·Journal of Women's Health·Sharon A ChungColin M Shapiro
Dec 22, 2015·Annals of Occupational and Environmental Medicine·Jae Youn KimSun Il Kwon
Apr 15, 2008·American Journal of Preventive Medicine·Clare L BambraMark P Petticrew
Apr 10, 2007·Sleep Medicine Reviews·Timothy R DriscollNaomi L Rogers
Sep 19, 2014·Chronobiology International·Rebecca Jane LoudounGeorgina Murray
Dec 26, 2016·Chest·Emerson M WickwireChristopher L Drake
Apr 13, 2000·Journal of Biological Rhythms·T H Monk
Oct 9, 1998·Occupational and Environmental Medicine·M L Flindt
Oct 9, 1998·Occupational and Environmental Medicine·A Tobias
Feb 5, 2014·Journal of Biological Rhythms·Svetlana PostnovaPeter A Robinson
Jul 20, 2010·Chronobiology International·Torbjörn AkerstedtJan Selén
Nov 20, 2004·American Journal of Industrial Medicine·Claire C CarusoBrenda W Gillespie

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