The sleep-extension group received counseling intended to extend time in bed to 8.5 hours; the control group continued its usual schedule. Both groups lived at home and received no prescribed diet or exercise plan.
Difference between groups after two weeks
Sleep increased by about 1.2 hours, and the change in energy intake was 270 kcal/day lower in the sleep-extension group than in control.
difference in change
What 270 kcal/day means
The figure is a difference between changes in two groups, not the amount every participant ate less.
From baseline, estimated energy intake fell by 155.5 kcal/day in the sleep-extension group and rose by 114.9 kcal/day in control. The difference between those changes was 270.4 kcal/day. Researchers estimated intake from doubly labeled water measurements of expenditure plus changes in body energy stores.
Who the result applies to
The trial did not test long-term weight loss or people who already slept longer.
The single-center US trial enrolled adults aged 21–40 with overweight and habitual short sleep. The intervention lasted two weeks. It does not show that every person will reduce intake by 270 kcal/day after extending sleep.
Test your own pattern
For one week, place sleep duration beside snack times and check whether the same pattern repeats after shorter nights.
How MorselFlow fits
A photo timeline can help recall how short-sleep days unfolded.
MorselFlow does not measure sleep. It keeps meal photos in time order, so you can bring back context such as a late night or an afternoon with more snacks.
The point is not to score one meal, but to notice a pattern across days.
This article explains research for a general audience. It is not diagnosis, treatment or individualized nutrition advice. Results depend on the participants and conditions and do not guarantee the same outcome for everyone.