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TechEngage » News » Health Care

You can’t catch up on lost sleep, new study says

Avatar Of Jessica Baron, Phd Jessica Baron, PhD Updated: January 13, 2020

A picture of a girl who appears to be trying to sleep
Photo by Kinga Cichewicz on Unsplash

Many of us look to the weekends or vacations days to catch up on lost sleep. And while it may feel nice to get in those extra hours and not have to worry about your alarm going off, a new study shows that “make-up” sleep just doesn’t do enough to counter the effects of regular sleep deprivation.

A Man Trying To Sleep In Front Of An Alarm Clock
Photo via army.mil

The Sleep Research Society and American Academy of Sleep Medicine both recommend that adults aged 18–60 years get at least 7 hours of sleep each night. Unfortunately, their estimates also show that around 35% of Americans report sleeping less than that, with 30% getting less than 6 hours.

Many sleep-deprived people have developed the habit of sleeping in on the weekends in order to cope with the effects.

But a team of researchers from the University of Colorado has shown that those extra hours might not do much good. They published their findings in the February 28th issue of the journal Current Biology. In their paper, they sought to answer the question of whether weekend recovery sleep could prevent the metabolic issues posed by insufficient sleep during the week.

Why study metabolic issues? Well, insufficient sleep alters the body’s metabolic regulation system and lead to obesity and diabetes.

In the study, the researchers assessed the sleep of a group of healthy, young adults as well as their circadian timing, energy intake, weight gain, and insulin sensitivity for 9 nights. They found that groups who were sleep deprived increased their after-dinner snacking and subsequently their body weight, regardless of whether they made up for their sleep deficiencies over the weekend. Insulin sensitivity was also affected by a lack of proper sleep, and make-up sleep did not help solve the problem.

“Our findings suggest that weekend recovery sleep is not an effective strategy to prevent metabolic dysregulation associated with recurrent insufficient sleep,” reported researchers.

Both energy intake and insulin resistance can lead to weight gain. Currently, there are hundreds of millions of obese adults with an increased risk of cardiovascular disease and diabetes. These illnesses take a toll on the individuals, who have a decreased quality of life, their families, and healthcare systems.

An Image Showing A Measurement Tape On Top Of A Glass

While getting enough sleep won’t make everyone lose weight, it could be a key factor in helping people slim down.

The study divided the subjects into three groups – one that got 9 hours of sleep for 9 nights, one that got just 5 hours to sleep for 9 nights, and a third that slept 5 hours for 5 days followed by a weekend in which they could sleep as much as they liked before returning to another 2 days of 5-hour sleep.

The two sleep-deprived groups both increased their snacking after dinner and gained weight during the study. The group allowed to “catch up” on sleep over the weekend did manage to consume fewer nighttime calories following a good night’s sleep, but returned to snacking as soon as their sleep was restricted again.

A Picture Of A Refrigerator Full Of Food

And when it came to insulin sensitivity, the news was even more surprising. The sleep-restricted group with no relief had a 13% decrease in insulin sensitivity. But the group that had a chance to sleep more on the weekends had it even worse – the insulin sensitivity of their whole bodies, liver, and muscle decreased by 9-27% after they went back to getting insufficient sleep. That means that their so-called “recovery sleep” could actually be doing more harm than good.

One researcher noted:

“This finding was not anticipated and further shows that weekend recovery sleep is not likely [to be] an effective sleep-loss countermeasure regarding metabolic health when sleep loss is chronic.”

The current research only related to chronic under-sleepers. The researchers intend to do another study to see if those who lose sleep only a few nights a week show the same metabolic and insulin effects and if daytime napping has any effect on metabolic regulation.

The best advice, for now, remains to do whatever you can to give yourself 7 hours or more to sleep at night and talk to your doctor if you simply can’t maintain that regimen.

This post was orginally published on: March 2, 2019 and was updated on: January 13, 2020.

Related Tags: insomnia metabolism obesity Research science Scientific Research sleep weight

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Avatar Of Jessica Baron, Phd

Jessica Baron, PhD

Former Editor-in-chief

I am a technology writer and tech ethics consultant whose work has appeared in international news and trade outlets. I have a PhD in History and Philosophy of Science and write about everything from future military weapons to advances in medicine.

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