The Claim
Sleep restriction to two-thirds of normal sleep time for 8 days increases daily caloric intake by an average of 559 kcal in healthy adults, with no concurrent change in activity energy expenditure, suggesting a potential mechanism for weight gain in individuals with chronic sleep loss.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
If you cut your sleep down to just two-thirds of what you normally get for eight days straight, you’ll likely eat about 559 extra calories a day without moving more—this could be why people who don’t sleep enough tend to gain weight.
See the scientific wording
Sleep restriction of two-thirds of normal sleep time for 8 days increases daily caloric intake by an average of 559 kcal in healthy adults, with no concurrent change in activity energy expenditure, suggesting a potential mechanism for weight gain in individuals with chronic sleep loss.
What the research says
1 studyStudy: Effects of experimental sleep restriction on caloric intake and activity energy expenditure.
The study made people sleep much less for 8 days and found they ate about 559 extra calories a day without moving more — exactly what the claim says. This could explain why people who don’t sleep enough tend to gain weight.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.