sleep garfield

Did you get 8 hours of sleep last night?

According to some new research, sleep restriction results in:

  • Decreased appetite
  • Decreased food cravings
  • Decreased food consumption, and
  • Increased bodyweight


Sleep less…Eat Less…Weigh more???

The Science

The study involved 92 healthy individuals (52 male) between the ages of 22 and 45 years who participated in laboratory controlled sleep restriction. Subjects underwent two nights of baseline sleep (10 hours in bed per night), five nights of sleep restriction and varying recovery for four nights. Nine well rested participants served as controls. Food consumption was ad libitum (subjects had three regular meals per day and access to healthy snacks, and during nights of sleep restriction subjects were given a small sandwich at one a.m.).

Results indicate that people whose sleep was restricted experienced an average weight gain of 1.31 kilograms (2.9 lbs) over the 11 days of the study.


I am sorry to say that there are no conclusions. The researchers have no idea what happened.

The researchers had hoped to see a link between sleep deprivation and an increased craving for carbs.

When that didn’t happen, they had to scramble. here’s what they came up with:

  • Lack of sleep may result in less activity (not measured), and
  • “the ability to snack for longer due to reduction in time spent asleep might have influenced the weight gain”. (and yet their measurement showed a reduction in caloric consumption)

My Conclusion/Assumption

I think that if the researchers had done some blood tests pre and post experiment, they would have seen some interesting changes.

Anyone who suffers from insomnia knows that lack of sleep has a huge impact upon both your physical and mental state of health.

I would have been curious to see the changes in levels of serotonin, dopamine, norepinephrine, etc along with insulin and various other obesity related hormones/brain chemicals.

Maybe next time.


This research was presented at the 23rd Annual Meeting of the Associated Professional Sleep Societies


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