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- Ekstedt, Mirjam, et al.
(författare)
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Microarousals during sleep are associated with increased levels of lipids, cortisol, and blood pressure
- 2004
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Ingår i: Psychosomatic Medicine. - : Ovid Technologies (Wolters Kluwer Health). - 0033-3174 .- 1534-7796. ; 66:6, s. 925-931
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Tidskriftsartikel (refereegranskat)abstract
- Objective: Previous work has demonstrated a link between restricted sleep and risk indicators for cardiovascular and metabolic disease, such as levels of cortisol, lipids, and glucose. The present study sought to identify relations between polysomnographic measures of disturbed sleep (frequency of arousals from sleep, total sleep time, and sleep efficiency) and a number of such indicators. A second purpose was to relate the number of arousals to mood, stress, work characteristics, and other possible predictors in daily life.Methods: Twenty-four people (10 men, 14 women; mean age 30 years), high vs. low on burnout, were recruited from a Swedish IT company. Polysomnographically recorded sleep was measured at home before a workday. Blood pressure, heart rate, morning blood sample, and saliva samples of cortisol were measured the subsequent working day. They were also recorded for diary ratings of sleep and stress, and a questionnaire with ratings of sleep, stress, work conditions, and mood was completed.Results: A stepwise regression analysis using sleep parameters as predictors brought out number of arousals as the best predictor of morning cortisol (serum and saliva), heart rate, systolic and diastolic blood pressure, total cholesterol, high-density lipoprotein (HDL)-, low-density lipoprotein (LDL)-cholesterol, and LDL/HDL-ratio. Work stress/unclear boundaries between work and leisure time was the best predictor of arousals among the stress variables.Conclusion: Consistent with sleep restriction experiments, sleep fragmentation was associated with elevated levels of metabolic and cardiovascular risk indicators of stress-related disorders. Number of arousals also seems to be related to workload/stress.
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- Kecklund, G, et al.
(författare)
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The effects of double-shifts (15.5 hours) on sleep, fatigue and health.
- 2001
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Ingår i: Journal of human ergology. - 0300-8134. ; 30:1-2, s. 53-8
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the present study was to investigate how "double-shifts" (15.5 hours) affects sleep, fatigue and self-rated health. The study was carried out on male construction workers of which 80% were long-distance commuters. The schedule involved two work periods and each work period involved two double shifts in a row. The subjects filled in a sleep/wake diary at 8 times across a year and a questionnaire at 3 times. They also wore an actigraph during one shift cycle. The results showed that sleepiness, and to a certain extent, mental fatigue increased during double shifts and accumulated across days. The short rest time (8.5 hours) between days caused insufficient sleep and approximately 5.5 hours of sleep was obtained between double shifts. 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 health-related well-being.
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- Söderström, Marie, et al.
(författare)
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Sleep and sleepiness in young individuals with high burnout scores
- 2004
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Ingår i: Sleep. - : Oxford University Press (OUP). - 0161-8105 .- 1550-9109. ; 27:7, s. 1369-1377
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Tidskriftsartikel (refereegranskat)abstract
- Study Objectives: Burnout is a growing health problem in Western society. This study aimed to investigate sleep in subjects scoring high on burnout but still at work. The purpose was also to study the diurnal pattern of sleepiness, as well as ratings of work stress and mood in groups with different burnout scores.Design: Sleep was recorded in 2 groups (high vs low on burnout) during 2 nights; 1 before a workday and 1 before a day off, in a balanced order. Sleepiness ratings as well as daytime diary ratings were analyzed for the workday and the day off after the sleep recordings.Setting: The polysomnographic recordings were made in the subjects' home.Participants: Twenty-four healthy individuals (14 women and 10 men) between the ages of 24 and 43 years participated.Interventions: N/A.Measurements and Results: A higher frequency of arousals during sleep (Workday: high burnout = 12 +/- 1 per hour, low burnout = 8 +/- 1 per hour; Day off: high burnout = 12 2 per hour, low burnout = 8 +/- 1 per hour), and more subjective awakening problems were found in the high-burnout group. The diurnal pattern of sleepiness indicated that the high-burnout group did not recover in the same way as did the low-burnout group on the day off. Indicators of impaired recovery were also seen within the high-burnout group as a higher degree of bringing work home and working on weekends, as well as more complaints of work interfering with leisure time.Conclusions: Young subjects with high burnout scores, but who are still working, show more arousals during sleep and an absence of reduced sleepiness during days off.
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