Wednesday October 16, 2019

Lack of Sleep Alters Fat Metabolism, Says Study

Nonetheless, according to Buxton, the study gives worthwhile insight into how we handle fat digestion

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The research revealed that 41 per cent of the people surveyed suffered from irregular sleep patterns because of work-related stress and working late at night. Pixabay

Lack of sleep can be harmful as it can make participants feel less full after eating and metabolise the fat in food differently, says a study, adding to the mounting evidence that how harmful lack of sleep can be.

The study, published in the journal of Lipid Research, by Pennsylvania State University found that sleep disruption has been known to be have harmful effects on metabolism for some time.

Orfeu Buxton, a professor at Penn State, added that long-term sleep restriction puts people at a higher risk of obesity and diabetes.

Kelly Ness, now a postdoctoral fellow at the University of Washington, ran the study when she was a graduate student in Buxton’s lab.

She and other researchers not only collected 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 uncomfortable 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, adding that most participants felt less satisfied after eating the same rich meal while sleep deprived than, when they had eaten it well-rested.

Phone, Sleep Problems, Week
Limiting evening exposure to blue-light emitting screens on smartphones, tablets and computers can reverse sleep problems. Flickr

Researchers then compared blood samples from the study participants. They found that sleep restriction affected the postprandial lipid response, leading to faster clearance of lipids from the blood after a meal. That could predispose people to put on weight.

“The lipids weren’t evaporating — they were being stored,” Buxton explained.

This study was highly controlled, which makes it an imperfect model for the real world, Ness said.

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

The researchers also wondered whether giving more recovery time would change the magnitude of recovery they observed.

Nonetheless, according to Buxton, the study gives worthwhile insight into how we handle fat digestion. (IANS)

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Proper Rest can Help in Lowering PTSD Symptoms: Study

Study says that rest can reduce the levels of Post Traumatic Stress Disorder (PTSD)

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A period of Rest after a traumatic event can reduce the subsequent development of involuntary 'memory intrusions', one of the symptoms in post-traumatic stress disorder (PTSD). Pixabay

A period of rest following a traumatic event could reduced the subsequent development of involuntary ‘memory intrusions’, one of the hallmark symptoms in post-traumatic stress disorder (PTSD), a new study said.

The study, published in the journal Scientific Reports, suggested that memory disturbances in PTSD might be ameliorated by increased ‘consolidation’ (a process by which memories are stored and contextualised), which could shed new light on treatment and prevention.

“Our findings contribute to a better understanding of the mechanisms that are at play when some people develop memory disturbances following trauma while others do not,” said the study’s lead author Lone Horlyck from the University College London.

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Research Says that strengthening of contextual memory system through rest is beneficial in preventing memory intrusions caused by trauma. Pixabay

For the findings, the researchers presented 85 participants with emotionally negative videos, followed by either a period of wakeful rest or a simple control task, where participants were required to pay attention to numbers on a screen.

The videos comprised highly emotional content, such as badly injured people or serious accidents.

The study found that participants who had a period of rest following the viewing of negative videos reported fewer memory intrusions related to the videos over the following week.

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Specific brain systems can be Targetted to reduce development of PTSD through Rest. Pixabay

Rest and certain phases of sleep are known to increase processing in the hippocampus, a key region of the brain for memory, and which places memories in context.

According to the researchers, the results suggested that a strengthening of this contextual memory system was beneficial in preventing memory intrusions following trauma.

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“The results show that specific brain systems could be targeted to reduce development of PTSD and may explain why treatments that focus on re-exposure and integrating the trauma with other information are beneficial,” said the study’s senior author, Professor Neil Burgess. (IANS)