Hormonal changes in satisfied and dissatisfied shift workers across a shift cycle

repeated-measures analysis of variance (ANOVA) with 1 between-group and 1 within-group measurements.


The investigators found that:

  • Dissatisfied shift workers had lower morning testosterone levels than satisfied ones, but the two groups did not significantly differ with respect to levels of cortisol or prolactin.
  • The only significant change across the shift cycle was the lowering of morning levels of cortisol on the last morning shift in the shift cycle.
  • In light of the testosterone results, they hypothesize that the low levels of testosterone may be due to disturbed sleep and/or a high sleep need, which in turn may result in more sleepiness and a greater need for recovery after a work period, and as a consequence, dissatisfaction with the shift schedule.


The results suggest that dissatisfaction with the shift system is related to lower testosterone levels, and that the latter are related to disturbed sleep/wakefulness and an increased need for sleep and recovery. In addition, working an entire shift cycle was related to a decrease of morning cortisol, which may relate to an adaptation to long-term stress.

Low testosterone levels and disturbed sleep might be key factors for developing shift intolerance, mainly by reducing the capacity to recover from shift work. Studies using larger sampling procedures are necessary to shed further light on the mechanisms involved in intolerance to shift work.


Contact: Donna Krupa
American Physiological Society

Page: 1 2 3

Related biology news :

1. Hormonal regulation of glucose production by fat cells
2. Hormonal changes during physiological development can alter immune response to viruses and infections
3. Hormonal recall
4. NIEHS And U.C. Davis Researchers Find Protein That May Be Key To Non-Hormonal Family Planning And Treatment Of Infertility
5. Hormonal Changes At Puberty Can Mask High Cholesterol In Blood
6. Adaptive changes in the genome may provide insight into the genetics of complex disease
7. Gene changes linked to increased eye pressure may have implications for glaucoma therapy
8. Study finds plant enzyme function changes with location in cell
9. Protein controls acid in cells by direct detection of volume changes, study finds
10. Gene mutation causes progressive changes to cell structure in children with Progeria
11. Researchers develop blood test that can detect genetic changes in progressive breast cancer

Post Your Comments:

(Date:8/12/2020)... ... August 12, 2020 , ... Mosio recently announced its ... public health agencies of all sizes. With a focus on tracking symptoms and ... appropriate health care, Mosio helps public health departments automate communications and provide more ...
(Date:8/3/2020)... , ... August 03, 2020 , ... ... announced a new partnership with medical equipment manufacturer, Spectrum Solutions, to provide COVID-19 ... to strengthen their laboratory supply chain for more than 10 years. Early in ...
(Date:7/18/2020)... ... 16, 2020 , ... A study has been published in ... active noise control device to attenuate typical noises in a simulated neonatal intensive ... alarm sounds from patient monitors, ventilators and other bedside devices that would affect ...
Breaking Biology News(10 mins):
(Date:7/18/2020)... ... July 16, 2020 , ... Medial EarlySign ... detection and prevention of high-burden diseases, and Centric Consulting, a business and technology ... to utilize existing data in order to identify and prioritize patients for care. ...
(Date:7/10/2020)... KONG (PRWEB) , ... July 09, 2020 , ... ... compound called 1-phenyl-2-thiourea (PTU) is commonly used to suppress pigment formation in zebrafish ... the PolyU research team led by Dr MA has been using the zebrafish ...
(Date:7/1/2020)... ... June 29, 2020 , ... MedShift , a leading ... despite many obstacles created as a result of COVID-19. As a provider at ... medical practices and medical manufacturers by expanding access to device offerings, technology services, ...
(Date:6/28/2020)... SAN JOSE, Calif. (PRWEB) , ... June 25, ... ... the globe, researchers are racing to develop a vaccine or drug treatment. In ... company Recursion has publicly released the world’s largest imaging dataset portraying ...
Breaking Biology Technology:
Cached News: