A new study that included about one million people in Britain finds that people who wake up late, so-called night owls, have 10% higher risk of dying sooner than people who rise and set with the sun.
For the study, the scientists have analyzed information on more than 430,000 people aged from 38 to 73 from a public database, who defined themselves as “definitely a morning person” (27%), “more a morning person than evening person” (35%), “more an evening person than a morning person” (28%), or “definitely an evening person” (9%).
One of the authors of the study Kristen Knutson of Northwestern University in Chicago says: “The higher risk may be because people who up late have an internal biological clock that doesn’t match their external environment. It could be psychological stress, eating at the wrong time for the body, not exercising enough, not sleeping enough, being awake at night by yourself, maybe drug or alcohol use.”
New research, executed by the scientists from the National Institute of Alcohol Abuse and Alcoholism, found that people who experienced just one night of bad sleep also known as sleep deprivation showed an immediate increase in levels of beta-amyloid, a protein that can form “plaques” that play a key role in Alzheimer’s disease.
For the study, the researchers studied 20 healthy adults aged between 22 and 72. After just one night of sleep deprivation, the scientists noticed that beta-amyloid levels have increased in the right hippocampus and thalamus of the subjects’ brains.
Authors conclude in their study: “Our results highlight the relevance of good sleep hygiene for proper brain function and as a potential target for prevention of Alzheimer’s disease.”
A recent study, published in the journal Scientific Reports, finds that children aged between 9 and 11 years who ate fish at least once a week had higher IQ scores and better sleep qualify than children who ate fish seldom.
For the study, a team of researchers assessed the fish consumption of 541 children from China aged 9–11. They used a dietary questionnaire to find out how much fish they consumed during the previous month.
Study co-author Prof. Adrian Raine, of the School of Arts and Sciences at Penn State’s Perelman School of Medicine, explains: “Lack of sleep is associated with antisocial behavior; poor cognition is associated with antisocial behavior. We have found that omega-3 supplements reduce antisocial behavior, so it’s not too surprising that fish is behind this.”
A new study, executed by the scientists from St. George’s, University of London, UK suggests that there is a link between sleep duration and risk of developing type 2 diabetes in children.
Professor Owen and his team examined 4,525 children of age 9 and 10 years living in the United Kingdom. On average, children slept for 10.5 hours. The analysis of the collected data showed that just one hour of less sleep significantly raised such risk factors of diabetes type 2 as blood sugar and insulin resistance.
Professor Cristopher G. Owen says: “These findings suggest that increasing sleep duration could offer a simple approach to reducing levels of body fat and type 2 diabetes risk from early life […]. Potential benefits associated with increased sleep in childhood may have implications for health in adulthood.”
Age-related differences in sleep patterns can guarantee that at least one person is awake at night in case of danger, according to the findings of a new study of modern hunter-gatherers in northern Tanzania still living in groups.
The hunter-gatherers in the study live and sleep in groups of 20 to 30 people and follow day and night cycles as humans did for hundreds of thousands years before the development of agriculture.
Study co-author Charlie Nunn, a professor of evolutionary anthropology at Duke University, says: “A lot of older people go to doctors complaining that they wake up early and can’t get back to sleep. But maybe there’s nothing wrong with them. Maybe some of the medical issues we have today could be explained not as disorders, but as a relic of an evolutionary past in which they were beneficial.”