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Sleep Research

Negative effects of caffeine are stronger on daytime recovery sleep than on nocturnal sleep

Published in Health and Medicine Week, October 23rd, 2006

A new study at the Université de Montréal has concluded that people drinking coffee to get through a night shift or a night of studying will strongly hurt their recovery sleep the next day.

The study, published in a recent issue of Neuropsychopharmacology, was conducted by Dr. Julie Carrier from the Department of Psychology at the Université de Montréal. Dr. Carrier runs the Chronobiology Laboratory at the Hôpital du Sacré-Coeur de Montréal.

"We already knew that caffeine has important effects on nocturnal sleep. It increases the time taken to fall asleep, it increases the amount of awakenings, and it decreases the amount of deep sleep. We...

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