I know, I know, you’re probably tired of us—and everyone else in your life—preaching

the importance of getting enough sleep…

If you’re still resisting because the Netflix series you’re watching is way more interesting

and addicting than sleeping, maybe this fact will do it for you:

Those who go to bed and wake up at the same time each morning are

less overweight than those who don’t!

New evidence of this came from a Duke University study this month


) that examined

2,000 adults’ sleep schedules and patterns. The study concluded adults who have a

regular bed time and a regular wake-up time are less obese than those who don’t.

On top of this, those with consistent bed and wake times have lower blood sugar levels

and are at a lower risk of developing various heart diseases including hypertension and

Type 2 diabetes.

The thought behind the evidence is that a consistent sleep schedule helps your body’s

circadian rhythm stay on point, and also helps other processes in your body, such as

appetite and digestion, function optimally.

Further, sleep is important for glucose metabolism, so it makes sense that not getting

enough of it results in metabolic and endocrine changes, such as a decrease in glucose

tolerance and insulin sensitivity, increased levels of hormones, like cortisol and ghrelin,

and decreased levels of leptin (a hormone related to appetite). All of this means more

hunger and appetite when you sleep less, which can lead to eating too much the next

day and ultimately a greater chance of becoming obese in the long term.

The long and the short of it is: Consistent sleep times = better metabolic health and less

unwanted obesity!

Of course, we don’t expect you to put all your faith in one study. So, here are some

more peer-reviewed evidence about sleep’s connection to metabolism.

This 2011 study  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2929498/  showed a

strong link between sleep duration and sleep quality with obesity.

This 2010 study ( https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2951287/  assigned

participants the number of hours they were allowed to sleep each night (either 5.5 or 8.5

hours) for 14 nights. They all cut their caloric intake by 680 calories and slept in the lab

for the duration of the study. Those who slept 5.5 hours lost 55 percent less body fat

and 60 percent less lean body mass than those who were allowed to sleep for 8.5

hours. Finally, an analysis of 36 studies that included 635,000 people

discovered those who don’t get enough sleep are 50 percent more

likely to be obese, while a child who doesn’t get enough sleep is 90

percent more likely to be obese than those who do!