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Shift Workers

Rotating shifts, a schedule common for doctors, nurses, and others, is linked to a higher risk of heart disease and type 2 diabetes. Shift work itself may disrupt circadian rhythms, the "body clock" that plays a role in blood sugar, blood pressure, and insulin regulation.

But lifestyle may be a factor too. Night-shift workers seem to be more likely to smoke, says Nieca Goldberg, MD, medical director of the Joan H. Tisch Center for Women's Health at NYU Langone Medical Center in New York City. And short sleep duration is linked to greater heart risk (5 to 6 hours per night vs. 7 to 8 hours).

(Getty Images)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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