Late bedtimes and less sleep could lead to weight gain

2 July 2013

A new study has found that healthy adults who go to bed late and do not get enough sleep could be more vulnerable to weight gain.

People who only spent four hours in bed from 4am to 8am for five days in a row gained more weight than those who slept for ten hours a night from 10pm to 8am in the study.

The experiment was conducted at the Sleep and Chronobiology Laboratory at the Hospital of the University of Pennsylvania. Participants spent up to 18 consecutive nights sleeping in the lab, with meals served at scheduled times and food available in the lab kitchen for those who wanted to eat at other times. They were allowed to move around, but physical exercise was not permitted.

Researchers there say that they believe taking in more calories from eating extra meals late at night is to blame. In addition, participants consumed more calories from fat late at night than at other times of the day.

Posted by Edward Bartel

 

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