DARIEN, IL – A new study suggests that healthy adults with late bedtimes and chronic sleep restriction may be more susceptible to weight gain due to the increased consumption of calories during late-night hours.
In the largest, most diverse healthy sample studied to date under controlled laboratory conditions, results show that sleep-restricted subjects who spent only four hours in bed from 4 a.m. to 8 a.m. for five consecutive nights gained more weight than control subjects who were in bed for 10 hours each night from 10 p.m. to 8 a.m. The study found an overall increase in caloric intake during sleep restriction, which was due to an increase in the number of meals consumed during the late-night period of additional wakefulness. Furthermore, the proportion of calories consumed from fat was higher during late-night hours than at other times of day.
Other researchers look for complex mechanisms involving hunger hormones boosted by lack of sleep. But these researchers have come up with a far simpler mechanism.
Have a hard time falling asleep? Cut your exposure to artificial light in the evenings. You can use UV-filtering glasses.
|Share |||Randall Parker, 2013 July 04 09:56 PM|