FITNESS

Lack Of Sleep Affects Fat Metabolism

Sleep disturbance has been known to have detrimental effects on metabolism for a while.

Orfeu Buxton, a professor at Penn State and one of the senior authors of this new study, contributed to lots of this research demonstrating that long-term sleep limitation puts people at a higher risk of diabetes and obesity.

But, Buxton explained, the majority of the studies have focused on sugar metabolism, which is very important to diabetes, while comparatively few have evaluated digestion of lipids in food. Kelly Ness, a postdoctoral fellow in the University of Washington, conducted the analysis when she had been a graduate student in Buxton’s lab.

After participants spent a week getting plenty of sleep in the home, she said, the 15 healthy men in their 20s assessed into the sleep laboratory for its ten-night study. For five of those nights the participants spent no more than five hours in bed each night.

During the analysis, Ness said, she and other investigators gathered data but also spent time, “interacting with the subjects, playing games with them, talking with them — helping to keep them awake and engaged and positive.

To find out how the embarrassing schedule affected metabolism, the researchers gave participants a standardized high-fat dinner, a bowl of chili mac, after four nights of sleep restriction.

It was very palatable — none of our subjects had trouble finishing it — but very calorically dense,”

Ness said. Most participants felt less satisfied after eating the exact same wealthy meal while sleep deprived than when they’d eaten it well-rested.

Then researchers compared blood samples from the research participants.

They discovered that sleep restriction affected the postprandial lipid response, resulting in faster clearance of lipids in the blood following a meal. That could predispose individuals to put on weight.

The simulated workweek ended with a simulated Friday and Saturday night when participants could spend ten hours in bed catching up on missed shut-eye. After the first night, they ate one last bowl of chili mac. Although participants’ metabolic handling of fat from food has been marginally better after a night of recovery sleep, they didn’t recuperate to the baseline healthful level.

It concentrated on healthy young people, who are usually at a lower risk of cardiovascular disease, and each of the participants were men.

The investigators also wondered whether lending more recovery time could change the size of retrieval they observed. Nonetheless, according to Buxton, the study gives a worthwhile insight into the way that we handle fat digestion.

“This study’s importance relies on its translational relevance. A high-fat meal in the evening, at dinnertime — and real food, not something infused into the vein? That’s a typical exposure.

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