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www.webmd.com/sleep-disorders/features/shift-work

In the U.S., about 8.6 million people perform shift work, whether they have a night job or rotate shifts during the week. For many, it's a rite of passage in their careers; for others, it's a ...

www.ccohs.ca/oshanswers/ergonomics/shiftwrk.html

The term "rotational shiftwork" covers a wide variety of work schedules and implies that shifts rotate or change according to a set schedule. These shifts can be either continuous, running 24 hours per day, 7 days per week, or semi-continuous, running 2 or 3 shifts per day with or without weekends.

www.medicalnewstoday.com/articles/288310.php

Many studies suggest that the irregular hours of shift work can have a negative impact on workers’ health. We have a look at why this could be and what can be done about it.

www.ncbi.nlm.nih.gov/pmc/articles/PMC1274227

As the popularity of shift work and other “alternative work schedules” grows, concern is increasing over the disturbance created in the lives of workers and their families by these economically and socially useful innovations. Twenty percent of workers are unable to tolerate shift work.

www.cdc.gov/niosh/topics/workschedules

Work schedules which include shift work and/or long hours are associated with health and safety risks. This page provides links to NIOSH publications and additional resources that address demanding work schedules including evening shift, night shift, rotating shifts, irregular schedules, and long work hours.

www.sciencedaily.com/releases/2015/01/150105081757.htm

These results add to prior evidence of a potentially detrimental effect of rotating night shift work on health and longevity. ... Rotating night shift work can be hazardous to your health ...

oem.bmj.com/content/58/1/68

Some workers only work on the two day shifts, some only nights, while others rotate through all three shifts with variable degrees of speed of rotation and direction of rotation. Extended hours of work is generally accepted to mean working more than 48 hours a week. This can occur on either day work or shift work due to either a high number of ...

www.ems1.com/.../articles/183960048-Why-shift-work-is-unhealthy-and-dangerous

Rotating schedules can negate some of the negative effects of shift work, provided that workers are working four or more shifts in a row before taking time off or switching shifts.

www.bls.gov/opub/mlr/1981/10/art5full.pdf

Shift work provides a number of nonpecuniary ad-vantages for some workers. Working evenings or nights allows employees more free time during the day and, in the case of rotating shift work, to accumulate several days off in a row on a regular basis. Some workers en-joy a variety of rotating shifts, while others appreciate

www.ncbi.nlm.nih.gov/pmc/articles/PMC5028173

Rotating and scheduling are the main characteristics of shift work and nurses are largely locked into schedules that provide 24-hour care and include night shift work.3 An author has noted that “shift workers are creators and victims at the same time” of this new work organization.4 Shift work, and night shift in particular, is one of the ...