Cortisol, reaction time test and health among offshore shift workers

Harris, Anette; Waage, Siri; Ursin, Holger; Hansen, Åse Marie; Bjorvatn, Bjørn; Eriksen, Hege R.

doi:10.1016/j.psyneuen.2010.03.006

Cited by 82 publications

(111 citation statements)

References 125 publications

(154 reference statements)

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“…However, following prolonged exposure to the stressors, the body's biological systems could mount a counter-regulatory response (dysregulation) such that the cortisol output rebounds to less than normal. The results from the current study are consistent with this hypothesis and in agreement with other studies that investigated cortisol rhythms in shift workers and found that the cortisol awakening response is decreased and evening cortisol levels are increased during shift work 19,25,35) . In a study of police officers from the current sample, the association between short-term shift work (3, 5, 7 and 14 days prior to saliva collection) and waking cortisol was examined and waking salivary cortisol levels were lower among night or afternoon shift officers compared to those on day shift 28) .…”

Section: Discussionsupporting

confidence: 93%

“…A study of total cortisol levels from hair samples 27) compared 33 shift workers and 89 day workers where shift workers were shown to have higher hair cortisol levels than day workers but the hair cortisol in this study measured total amount of cortisol released over the last 3 months while our measure concerns how much is released in response to the awakening signal. In a study of chronic stress associated with unemployment, unemployed subjects had higher morning and lower evening salivary cortisol levels compared to employed subjects 35) . In a sample of 100 university students, those who perceived a higher level of chronic stress due to workload had higher early morning cortisol increase after awakening than those who did not 36) .…”

Section: Discussionmentioning

confidence: 93%

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Associations of Long-term Shift Work with Waking Salivary Cortisol Concentration and Patterns among Police Officers

et al. 2012

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The objective of this study was to evaluate whether long-term shift work is associated with both the total hormonal secretion after awakening and the pattern of the cortisol levels during the first hour following awakening, among 65 randomly selected police officers who represent a high stress occupation. Dominant shift (Day, Afternoon, or Midnight) was ascertained using daily payroll records of each participant's work activities during the 6-8 yrs prior to saliva sampling. Four salivary samples were collected at 15 min intervals upon first awakening. After accounting for potential confounders, salivary cortisol concentrations averaged across all four time points and total area under the curve differed significantly across shift with midnight shift workers showing suppressed awakening cortisol response relative to the afternoon and day shift. The percent of hours worked on midnight shift was inversely correlated with total awakening cortisol output. In contrast, the pattern of cortisol secretion during the first hour following waking appeared not to be affected as no significant interaction effect was found between time since awakening and shift work. The results show that long-term midnight shift work is associated with decreased absolute mean level and total volume of cortisol released over the waking period.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 93%

Associations of Long-term Shift Work with Waking Salivary Cortisol Concentration and Patterns among Police Officers

et al. 2012

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“…Meanwhile, the normal circadian patterns of cortisol were augmented by Fiberpro with peaks in the morning and troughs in the evening, and these patterns persisted even after the discontinuation of supplementation. Cortisol is a hormone that is released from the adrenal cortex in response to various stressors that activate the hypothalamic-pituitary-adrenal (HPA) axis [9] [10] [11]. As such, it is a well-known biomarker of stress.…”

Section: Discussionmentioning

confidence: 99%

Effects of Fiber Supplementation for Four Weeks on Athletic Performance in Japanese College Athletes: A Case Study—Measurement of the Athletic Performance, Salivary Biomarkers of Stress, and Mood, Affect Balance

Sugiyama¹,

Yamaguchi²,

Hu³

et al. 2017

Health

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Aim: In this study, we explored the effects of dietary fiber on athletic performance. Methods: Twenty healthy college athletes (male/female, 1/1) consumed 6 grams of dietary fiber (Fiberpro, Taiyo Lab Inc., Tokyo) daily for four weeks and were evaluated for their athletic performance, salivary biomarkers of stress (α-amylase activity pre-post exercise, cortisol, melatonin, and secretory immunoglobulin A (SIgA) levels), and mood/affect using the Profile of Mood State 2 nd edition (POMS 2®). Measurements were taken at baseline (before supplementation), at Week 4 (after 4 weeks of supplementation), and at Week 8 (4 weeks after the completion of supplementation). Results: Results showed that athletic performance and exercise-induced elevation in salivary α-amylase activity improved with Fiberpro supplementation in both men and women. Further, the Anger-Hostility scale in POMS was significantly elevated in men; in women, an increase in Vigor-Activity score, a single index of positive mood, was noted. These findings suggest that Fiberpro may induce differential affective responses in men and women. Meanwhile, Fiberpro did not affect the normal diurnal changes in salivary melatonin and SIgA levels, but it appeared to augment the normal circadian patterns of cortisol, an effect that persisted for a month without Fiberpro intake. We propose that boosting fiber intake in young, healthy athletes may improve gut microbiota and confer resilience against stress.

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“…The normal pattern is that sleep is reduced by approximately 2 hours when working early morning or night shifts (11). Previous studies have already demonstrated that workers in isolated environments are able to complete adapt to night shifts within a week (9,12,13). This is a much faster adaptation than what happens with workers in less isolated environments, where the adaptation normally takes between 8-14 days.…”

Section: Introductionmentioning

confidence: 99%

“…The cortisol awakening response (CAR), defined as the period of cortisol secretory activity in the first 30 to 60 minutes immediately post-awakening, is presumed to be determined by circadian influences but will also reflect phasic psychophysiological processes specific to the waking-up Cortisol levels in construction workers in the Arctic process (6,8). Saliva cortisol sampled immediately after awakening and during the working period is a good indicator for any changes in diurnal rhythm associated with different working schedules (9).…”

Section: Introductionmentioning

confidence: 99%

Saliva cortisol levels in construction workers in the Arctic (78°N)

Harris¹,

Waage²,

Ursin³

et al. 2011

International Journal of Circumpolar Health

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Objectives. The aim was to investigate how working in an extreme and isolated environment in the Arctic affected the diurnal rhythm of saliva cortisol. Study design. Field study. Methods. Twenty-five male tunnel workers were screened during 3 different working cycles with different light conditions during a 9-month construction period; April/May (24 hours [h] light), September/October (approximately 12 h light and 12 h darkness) and November/December (24 h darkness). The work schedule was 10 h on/14 h off, 21 days at work/21 days off work. The workers alternated between the day shift in 1 work period and the night shift in the next. Four saliva samples were collected on day 14 in all 3 periods; immediately after awakening, and then 30 minutes, 6 hours and 12 hours after awakening. Results. Regardless of shift schedule, the workers' cortisol levels were significantly lower in the period with 24 hours of light per day compared to the period with "normal" light conditions. There were no differences in the cortisol levels of the workers on night shifts in the period with 24 hours of darkness compared to those in the period with "normal" light conditions, but the workers who were on day shifts in the period with 24 of hours darkness had a disturbed cortisol rhythm (lower peak after awakening and lack of the normal decrease during the day). Conclusions. External light conditions and shift schedule were important factors in regulating the workers' cortisol rhythm. It seems to be easier to adapt to a night rhythm than an early morning rhythm in an isolated and extreme environment.

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Cortisol, reaction time test and health among offshore shift workers

Abstract: We found no increase in health complaints from swing shift or reaction time in the shift from night to day work. Recovery from night shift takes longer time.

Cited by 82 publications

References 125 publications

Associations of Long-term Shift Work with Waking Salivary Cortisol Concentration and Patterns among Police Officers

Associations of Long-term Shift Work with Waking Salivary Cortisol Concentration and Patterns among Police Officers

Effects of Fiber Supplementation for Four Weeks on Athletic Performance in Japanese College Athletes: A Case Study—Measurement of the Athletic Performance, Salivary Biomarkers of Stress, and Mood, Affect Balance

Saliva cortisol levels in construction workers in the Arctic (78°N)

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