Over 6 million Americans work non-traditional hours, also know as the night shift. The sleep/wake cycle is controlled by a section of the brain called the circadian clock. This controls the release of the hormone melatonin, which makes you fall asleep. Since our circadian clock is meant to release melatonin when it is dark outside, many people who work night hours suffer from sleep-related conditions like shift work sleep disorder. Some symptoms include difficulty falling asleep, headaches and an overall lack of energy.
Buscemi N, Vandermeer B, Hooton N, et al. Efficacy and safety of exogenous melatonin for secondary sleep disorders and sleep disorders accompanying sleep restriction: meta-analysis. BMJ2007;332:385-393.
Czeisler C, Walsh J, Roth T, et al. Modafinil for Excessive Sleepiness Associated with Shift-Work Sleep Disorder. N Engl J Med2009;353(5):476-486.
Fritschi L. Shift Work and Cancer. BMJ2009;339:b2653.
Morikawa Y, Nakagawa H, Miura K, et al. Effect of shift work on body mass index and metabolic parameters. Scand J Work Environ Health 2007;33(1):45-50.
Schecter A, James F, Boivin D.Circadian Rhythms and Shift Working Women. Sleep Medicine Clinics 2008;3:13-24.
Sleep Tips for Shift Workers.Westhchester, IL.: American Academy of Sleep Medicine, 2007. (Accessed on October 15, 2008 at http://yoursleep.aasmnet.org/topic.aspx?id=54.)