ILO Home
Go to the home page
Site map | Contact us Franšais | Espa˝ol

CISDOC database

Document ID (ISN)102062
CIS number 03-1459
ISSN - Serial title 0300-8134 - Journal of Human Ergology
Year 2001
Convention or series no.
Author(s) Kecklund G., Ekstedt M., ┼kerstedt T., Dahlgren A., Samuelson B.
Title The effects of double-shifts (15.5 hours) on sleep, fatigue and health
Bibliographic information Dec. 2001, Vol.30, No.1-2, p.53-58. Illus. 14 ref.
Abstract The aim of this study was to investigate how "double-shifts" (15.5h) affect sleep, fatigue and self-rated health. The study involved 48 male construction workers working during two work periods, with each work period consisting of two consecutive double shifts. The subjects filled in a sleep/wake diary and responded to a questionnaire on several occasions during the course of a year. The results showed that sleepiness, and to a certain extent, mental fatigue, increased during double shifts and accumulated across days. The short rest time (8.5h) between days allowed an insufficient sleep period of approximately 5.5h. Questionnaire data showed that complaints of insufficient sleep, exhaustion on awakening and pain symptoms increased across the year. It was concluded that a shift system involving double shifts has a negative effect on fatigue, recovery and well-being.
Descriptors (primary) shift work; state of health; construction industry; hours of work; sleep
Descriptors (secondary) male workers; symptoms; sleep pattern; mental stress; sleep disturbances; questionnaire survey; fatigue
Document type D - Periodical articles
Country / State or ProvinceSweden
Subject(s) Occupational physiology
Broad subject area(s) Physiology, ergonomics
Browse category(ies) Fatigue
Construction industry and civil engineering
Hours of work