If yo
u crave chocolate or Cheetos after a hectic day, it may be because you’re sleep deprived, a new study suggests. Researchers have found that lack of sleep may lead to increased appetite and affinity for unhealthy foods.
According to the Centers for Disease Control, one in three U.S. adults don’t get enough sleep and roughly the same percentage are obese. Study author Erin Hanlon, a research associate at the University of Chicago, aimed to connect these two nationwide problems.
“Evidence from laboratory and epidemiological studies has started to consistently associate insufficient sleep with an increased risk of obesity,” she said.
Lack of sleep can be a risk factor because it boosts hunger, due to the delicate balance between the nutrients consumed and the energy costs of staying awake, which remain generally the same whether you’ve had enough sleep or not.
Hanlon’s study, published in the journal Sleep, compared 14 otherwise healthy young adults who had four nights of normal sleep (8.5) with those with four nights of restricted sleep (4.5 hours). Both groups were provided with carefully prepared meals. On the final day, participants were given a healthy meal, followed by free rein at a snack bar containing treats including cookies, candy and chips (what researchers dubbed “highly palatable, rewarding snacks”). Those in the sleep-deprived group tended to eat snacks with more carbohydrates and nearly twice as much fat and protein.
The team’s previous research suggested that sleep deprivation affected levels of endocannabinoids, chemicals in the brain that are involved in regulating appetite and bind to the same receptors as marijuana.
The study is an important step in understanding the relationship between the endocannabinoid system, sleep deprivation and weight gain, Hanlon said. In a commentary published with the study, Frank Scheer of the Medical Chronobiology Program at Brigham and Women’s Hospital said that “uncovering and understanding the respective influence of these different factors may aid in designing novel strategies to modulate the signaling via the endocannabinoid system without the need for drug interventions.”
Hanlon noted that sleep deprivation has been associated with multiple negative outcomes, and this is only one step in understanding how getting enough rest can really improve our health. “We are trying to get out awareness that people need to think of adequate sleep as an important aspect of maintaining good health,” she said.
According to the “Sleep Debt” article in Wikipedia “There is debate among researchers as to whether the concept of sleep debt describes a measurable phenomenon.” I think it’s a modern prejudice that people don’t get enough sleep.