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Less Melatonin, More Stress

Study Ties Night Shift to Breast Cancer Risk

A study involving women who served in the Danish Army between 1964 and 1999 found that working the night shift increases risk of developing breast cancer. Questionnaires that asked about work patterns were filled out by 141 women who developed breast cancer and 551 women who did not. Working at night increased the risk by 40 percent and doubled if they worked three nights a week for a minimum of six years or said they were night owls. The risk quadrupled in night shift workers who claimed to be morning people. Working at night lowers the production of a protective hormone called melatonin and raises stress. These results add to previous research that has shown a similar link. Researchers suggest adjusting the wavelength of light so it does not suppress melatonin.

More at Yahoo! HealthDay | Posted 7 years ago by Kristie Hayes

Previously: Weird Work Schedules Wreak Havoc on Health, Shift Works Alters Menstrual Cycle

Tags: Breast Cancer, Breast Cancer Risk Factors, Melatonin, Night Shift Work, Occupational Hazards, Rotating Shift Work, Night Shift Work and Health Problems, Stress on the Job

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Disrupts Wake-Sleep Cycle

Weird Work Schedules Wreak Havoc on Health

There is growing evidence to suggest that working nights is not only linked to sleeping on the job but also to other health issues. Recently stories about air traffic controllers falling asleep on the job have brought this issue to light again but studies reveal that 30 to 50 percent of people who work nights doze off while working at least once week. Night shifts disrupt the circadian rhythm, or wake-sleep cycle that is controlled by hormones. For people on rotating shifts the brain becomes confused and not sure when it’s bedtime which ends up impairing concentration, memory and learning. Research has also shown that the risk of some chronic diseases and even cancer is increased in night workers. Shift work is now considered a “probable carcinogen” by the World Health Organization.

More at Yahoo! AP | Posted 8 years ago by Kristie Hayes

Previously: Long Hours on the Job Linked to Heart Disease

Tags: Circadian Rhythm, Rotating Shift Work, World Health Organization, Shift Work, Night Shift Work, Night Shift Work and Wake-Sleep Cycle, Wake-Sleep Cycle, Shift Work a Probable Carcinogen, Shift Work and Health Problems, Sleeping on the Job, Work Schedules

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