HEALTHY LIVING
10/18/2013 08:13 am ET Updated Dec 18, 2013

Everyday Jet Lag

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If you consider yourself to be a born morning person or an inveterate night owl, there is new research that supports your desire to wake up early or stay up late. Each of us has a personal "chronotype," or unique circadian rhythm, says Till Roenneberg, a professor of chronobiology at Ludwig Maximilian University in Munich and one of the world's experts on sleep.

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