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Just Four Nights Of Poor Sleep Can Make You Fat, Study Finds

Time to catch up on some shut-eye - by Alex Pierotti
  • 27 Sep 2019
Just Four Nights Of Poor Sleep Can Make You Fat, Study Finds
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While eating well and exercising might help you get that dream body, it turns out what you're not doing is just as important. And that includes getting a good night's rest.

According to a new study out of Pennsylvania State University, just four nights of poor sleep can lead to weight gain.

The findings, published in the Journal Of Lipid Research, suggest that not getting enough ZZZs changes the way the body stores fat and increases the risk of obesity. 

For their research, scientists recruited 15 males in their 20s. In the first week, volunteers enjoyed 10 hours of sleep a night.

They then spent the next ten nights at the Clinical Research Centre at Penn State. During their stay at the clinic, they were put on a diet limited to a high-fat, calorie dense plat of chilli and pasta. 

RELATED: 5 Ways To Sleep Better Every Night

While visiting, their sleep was restricted to five hours for four consecutive nights. 

By taking blood samples, researchers found that the lack of sleep led to high levels of insulin – a hormone necessary in taking glucose from the bloodstream (type 2 diabetes is when the body can't efficiently use it's insulin to manage blood glucose levels).

In this case, due to the high levels of insulin, the body takes in fats and lipids quicker, leading to weight gain.

"Across a lifetime of exposure to short sleep, this could increase the risk of obesity, diabetes, or other metabolic diseases," said lead author Kelly Ness.

"The primary problem in obesity is how fat tissue functions to store fat energy," adds co-author and associate professor of nutritional sciences at Penn state, Dr Greg Shearer.

"By storing fats quickly, fat tissues appear to shift fuel utilisation away from fats and prioritise the use of sugars for fuel. Here we show evidence that sleep restriction exaggerates this process, conserving energy stores."

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Alex Pierotti
Alex Pierotti
Alex Pierotti is the Digital Content Editor for Men's Health Australia, with experience reporting on health, fitness and sport. With a Journalism degree from UNSW under his belt, he got his start working in TV, working on the live broadcast of the Intrust Super Shute Shield on 7TWO before making the switch to print and digital at Pacific Magazines.

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