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If You’re Not Sticking To A Regular Sleep Schedule, You’re Hurting Your Health, Study Says

Ok, I admit it. I often stay up late on weekends, catching up on TV or seeing friends, then decadently allow myself to slumber for hours past my regular wake-up time the next morning.

To a diehard night owl like me, this is delicious freedom, a sort of personal protest against the rigidity of the obnoxious workday alarm.

Sound familiar? If so, fellow snooze buddies, it turns out our lack of a regular sleep routine is hurting our health.

A new study published Monday found changing your regular sleep-wake time by 90 minutes — in either direction — significantly increases your chance of having a heart attack or heart disease.
A regular sleep time was defined in the study as less than 30 minutes difference, on average, across seven nights.

“Compared with people who had the most regular sleep time, those with the most irregular sleep time — more than a 90 minute difference on average across seven nights — had more than a two-fold increased risk of cardiovascular disease over a 5-year period,” said study author Tianyi Huang, an assistant professor of medicine at Harvard Medical School.

The link remained strong even after controlling for cholesterol, blood pressure and other known cardiovascular risk factors, as well as sleep issues such as insomnia, sleep apnea and sleep duration.
That suggests, Huang said, that high day-to-day variability in sleep duration or timing may be a “novel and independent cardiovascular risk factor.”

“That’s huge,” said Dr. David Goff, who directs the division of cardiovascular sciences at the United States National Heart, Lung and Blood Institute.
“One out of three people in the US die from heart disease, and 60% of us will have a major cardiovascular disease event before we die,” said Goff, who was not involved in the study.
“People are living busy, stressful lives and not getting a lot of sleep during the week,” Goff said. “Then they are trying to get catchup sleep on the weekend, and that’s not a healthy pattern.”

The link between sleep and heart

The cardiovascular system — including heart rate, blood pressure and vascular tone — operates on a strong circadian rhythm to maintain normal functioning.

Messing with our internal sleep clock “has been linked to cardiovascular risk factors like hypertension, insulin resistance or diabetes,” Huang said, “but this is the first study to link an irregular sleep pattern pattern with cardiovascular disease.”

The study followed more than 2,000 people ages 45 to 84 without any cardiovascular disease over a five-year period. After a baseline exam, follow-up physicals measured any lifestyle, medication or disease changes, while a sleep study tested for sleep disorders like apnea.

Then the participants wore a sleep wrist tracker for seven consecutive nights.

“About a quarter of people in this age range didn’t have a regular time for going to sleep,” Goff said.

Since many of the participants were retired, it was surprising to find some 500 people had significantly disrupted sleep schedules.

While it may appear this link is strongest for the elderly, that may not be the case. A previous analysis of 53 studies on people age 18 and up found younger age to be more consistently associated with a variable sleep cycle.

“This sleep irregularity may be even more common among younger people,” Huang said. “Younger people may have more demands from study and from work, and those may also influence whether they can have a regular sleep pattern or not.”

If that becomes a habit in life, the results could be dangerous. That’s because the study also found a linear upward link between disrupted sleep cycles and heart issues.

“The more you sleep irregularly, the higher the risk you have,” Huang said.

Better sleep habits

The good news is that you can do something about your poor sleep habits.

Get moving. Exercise is key to promoting good sleep. As little as 10 minutes a day of walking, biking or other aerobic exercise can “drastically improve nighttime sleep quality,” according to the National Sleep Foundation.

Strive for cooler temperatures. Make sure your bed and pillows are comfortable, and the room is cool: Between 60 and 67 degrees is best. Don’t watch TV or work in your bedroom. You want your brain to think of the room as only for sleep.

Avoid certain food and drink. Avoid stimulants such as nicotine or coffee after mid afternoon, especially if you have insomnia. Alcohol is another no-no. You may think it helps you doze off, but you are more likely to wake in the night as your body begins to process the spirits.

Develop a routine. Taking a warm bath or shower, reading a book, listening to soothing music, meditating or doing light stretches are all good options.

Be good to your circadian rhythm. “Like your mom always told you, you should have a regular bedtime and a regular time for getting up in the morning,” advised Goff.

Keep yourself in the dark. Be sure to eliminate all bright lights, as even the blue light of cellphones or laptops can be disruptive. If that’s hard to accomplish, think about using eye shades and blackout curtains to keep the room dark. But during the day, try to get good exposure to natural light, as that will help regulate your circadian rhythm.

Follow these steps, and you’ll be well on your way to improving your sleep habits and your health.

By Sandee LaMotte, CNN      March 2, 2020
source: www.cnn.com

 

sleep

 

Study Finds Link Between Dementia And Lack Of Sleep

A growing body of research suggests poor sleep is tied to impaired thinking and dementia in older adults. Now a new study may shed light on why.

Researchers at the University of Toronto have found a potential explanation of what disrupted sleep does to the human brain. They studied 685 adults older than 65, who participated in two large U.S. studies, and looked at their sleep patterns, their performance on thinking tests and, later, their brain-tissue samples after the participants died.

The researchers’ findings, published Wednesday in the journal Science Advances, indicate disrupted sleep may contribute to changes in a type of immune cell in the brain called microglia, which in turn appear to be related to poorer cognitive functions, such as memory and the ability to reason.

While further research is needed to determine whether fixing people’s sleep problems can prevent or reverse cognitive decline, Andrew Lim, one of the authors of the study, said fragmented sleep should not be ignored.

Many people believe “having bad sleep is just part of aging, and it’s something that’s annoying but to be tolerated, rather than aggressively managed or aggressively investigated,” said Dr. Lim, an associate professor of neurology at the University of Toronto and sleep neurologist at the Sunnybrook Health Sciences Centre. “This adds one more reason to take sleep [problems] seriously and to look for your treatable causes and to address them.”

This study builds on previous research, including studies on rodents and genetic studies, that suggest microglia play a role in the link between poor sleep and cognitive impairment and dementia. Microglia normally help fight infections and clear debris from the brain. But dysfunction of microglia appears to be involved in the development of Alzheimer’s disease, Dr. Lim said.

In the study, researchers recorded participants’ sleep disruptions by having them wear wristwatch-like actigraphy devices, which could detect subtle signs of them awakening at night, even when participants themselves were unaware. The participants were asked to wear these devices for 10 days, once a year, for a median period of two years.

Participants also performed a series of cognitive tests annually. They agreed to donate their brains for research after their death, and researchers were able to examine their microglia in two ways. First, since activated and resting microglia differ in appearance, researchers were able to determine the density and proportion of activated microglia by looking at participants’ brain tissue under a microscope, Dr. Lim said. Then, they examined patterns of gene expression to identify “older” versus “younger” microglia – that is, whether the microglia appeared as though they came from an older person from a genetic perspective.

The researchers found connections between all three variables. Individuals who had higher levels of sleep fragmentation had a higher proportion of activated microglia and gene expression characteristic of older microglia. This was the case both for participants who had Alzheimer’s disease and those who did not. Those with poorer sleep also performed worse on their cognitive tests. And participants who had a greater proportion of activated microglia or genetically older microglia also had poorer cognitive test results.

Professor Teresa Liu-Ambrose of the University of British Columbia, who was not involved in the study, said the findings align with what researchers know thus far about the importance of sleep and the possible contribution of poor sleep to Alzheimer’s disease.

Dr. Liu-Ambrose, the Canada research chair in physical activity, mobility and cognitive neuroscience at UBC, said good-quality sleep is believed to allow the brain to clear itself of toxic beta-amyloid protein, the buildup of which is one of the characteristics of Alzheimer’s disease. And, she said, there is also good evidence to suggest an accumulation of beta-amyloid can further contribute to disrupted sleep.

“It’s a vicious cycle,” she said.

“What [the new study] really does show is that it’s important to protect your sleep overall,” she said. “[Sleep quality] does seem to have very direct effects on the brain, both acutely, but also chronically.”

 

WENCY LEUNG    HEALTH REPORTER     DECEMBER 11, 2019
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Mushrooms May Reduce Risk of Cognitive Decline in Older Adults

Older adults who consume more than two servings of mushrooms each week may reduce their risk of mild cognitive impairment (MCI) by 50 percent, according to a new 6-year study conducted by researchers from Yong Loo Lin School of Medicine at the National University of Singapore (NUS).

“This correlation is surprising and encouraging. It seems that a commonly available single ingredient could have a dramatic effect on cognitive decline,” said Assistant Professor Lei Feng, who is from the NUS department of psychological medicine, and the lead author of this work.

The study used six types of mushrooms commonly consumed in Singapore: golden, oyster, shiitake and white button mushrooms, as well as dried and canned mushrooms. However, researchers believe it is likely that other mushrooms would also have beneficial effects.

A serving was defined as three quarters of a cup of cooked mushrooms with an average weight of around 150 grams. Two servings would be equivalent to about half a plate. While the portion sizes act as a guideline, the study found that even one small serving of mushrooms a week may still help reduce chances of MCI.

MCI falls between the typical cognitive decline seen in normal aging and the more serious decline of dementia. Older adults with MCI often exhibit some form of memory loss or forgetfulness and may also show declines in other types of cognitive function such as language, attention and visuospatial abilities.

These changes can be subtle, as they do not reflect the disabling cognitive deficits that can impact everyday life activities, which are characteristic of Alzheimer’s and other forms of dementia.
The research, which was conducted from 2011 to 2017, collected data from more than 600 Chinese seniors over the age of 60 living in Singapore. The findings are published online in the Journal of Alzheimer’s Disease.

“People with MCI are still able to carry out their normal daily activities. So, what we had to determine in this study is whether these seniors had poorer performance on standard neuropsychologist tests than other people of the same age and education background,” Feng said.

mushrooms

As such, the researchers conducted extensive interviews which took into account demographic information, medical history, psychological factors, and dietary habits. A nurse measured blood pressure, weight, height, hand grip, and walking speed. The participants also completed a simple screen test on cognition, depression and anxiety.

Finally, a two-hour standard neuropsychological evaluation was performed, along with a dementia rating. The overall results of these tests were discussed in depth with psychiatrists to come to a diagnostic consensus.

The researchers believe the reason for the reduced prevalence of MCI in mushroom eaters may come down to a specific compound found in almost all varieties. “We’re very interested in a compound called ergothioneine (ET),” said Dr. Irwin Cheah, Senior Research Fellow at the NUS Department of Biochemistry.

“ET is a unique antioxidant and anti-inflammatory which humans are unable to synthesize on their own. But it can be obtained from dietary sources, one of the main ones being mushrooms.”

A previous study by the team on elderly Singaporeans revealed that plasma levels of ET in participants with MCI were significantly lower than age-matched healthy individuals. The findings led to the belief that an ET deficiency may be a risk factor for neurodegeneration, and increasing ET intake through mushroom consumption might possibly promote cognitive health.

The next step is to conduct a randomized controlled trial with the pure compound of ET and other plant-based ingredients, such as L-theanine and catechins from tea leaves, to determine the potential of such phytonutrients in delaying cognitive decline.

By Traci Pedersen    Associate News Editor
13 Mar 2019

Source: National University of Singapore


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Study: Memories of Music Cannot Be Lost to Alzheimer’s and Dementia

The part of your brain responsible for ASMR catalogs music, and appears to be a stronghold against Alzheimer’s and dementia.

Some music inspires you to move your feet, some inspires you to get out there and change the world. In any case, and to move hurriedly on to the point of this article, it’s fair to say that music moves people in special ways.

If you’re especially into a piece of music, your brain does something called Autonomous Sensory Meridian Response (ASMR), which feels to you like a tingling in your brain or scalp. It’s nature’s own little “buzz”, a natural reward, that is described by some as a “head orgasm”. Some even think that it explains why people go to church, for example, “feeling the Lord move through you”, but that’s another article for another time.

Turns out that ASMR is pretty special. According to a recently published study in The Journal of Prevention of Alzheimer’s Disease (catchy name!), the part of your brain responsible for ASMR doesn’t get lost to Alzheimer’s. Alzheimer’s tends to put people into layers of confusion, and the study confirms that music can sometimes actually lift people out of the Alzheimer’s haze and bring them back to (at least a semblance of) normality… if only for a short while. ASMR is powerful stuff!

This phenomenon has been observed several times but rarely studied properly. One of the most famous examples of this is the story of Henry, who comes out of dementia while listening to songs from his youth:

Jeff Anderson, M.D., Ph.D., associate professor in Radiology at the Univerity of Utah Health and contributing author on the study, says  “In our society, the diagnoses of dementia are snowballing and are taxing resources to the max. No one says playing music will be a cure for Alzheimer’s disease, but it might make the symptoms more manageable, decrease the cost of care and improve a patient’s quality of life.”

NED DYMOKE       29 April, 2018

 

music

Music Therapy Can Reduce Depression in Children and Teens

Summary: A new study reports music therapy can help to reduce depressive symptoms in children and teens with emotional and behavioral problems.

Researchers at Bournemouth University and Queen’s University Belfast have discovered that music therapy reduces depression in children and adolescents with behavioural and emotional problems.

In partnership with Every Day Harmony (the brand name for Northern Ireland Music Therapy Trust), the researchers found that children and young people, aged 8-16-years-old, who received music therapy had significantly improved self-esteem and reduced depression compared with those who received treatment without music therapy.

The study, which was funded by the Big Lottery Fund, also found that young people aged 13 and over who received music therapy had improved communicative and interactive skills, compared to those who received usual care options alone. Music therapy also improved social functioning over time in all age groups.

In the largest ever study of its kind, 251 children and young people were involved in the study, which took place between March 2011 and May 2014. They were divided into two groups: 128 underwent the usual care options, while 123 were assigned to music therapy in addition to usual care. All were being treated for emotional, developmental or behavioural problems.

Professor Sam Porter of the Department of Social Sciences and Social Work at Bournemouth University, who led the study, said: “This study is hugely significant in terms of determining effective treatments for children and young people with behavioural problems and mental health needs. The findings contained in our report should be considered by healthcare providers and commissioners when making decisions about the sort of care for young people that they wish to support.”

In the largest ever study of its kind, 251 children and young people were involved in the study, which took place between March 2011 and May 2014. They were divided into two groups: 128 underwent the usual care options, while 123 were assigned to music therapy in addition to usual care. All were being treated for emotional, developmental or behavioural problems. NeuroscienceNews.com image is credited to Bournemouth University.

Dr Valerie Holmes, Centre for Public Health, School of Medicine, Dentistry and Biomedical Sciences, Queen’s University Belfast and co-researcher, added: “This is the largest study ever to be carried out looking at music therapy’s ability to help this very vulnerable group.”

Ciara Reilly, Chief Executive of Every Day Harmony, the music therapy charity that was a partner in the research, said: “Music therapy has often been used with children and young people with particular mental health needs, but this is the first time its effectiveness has been shown by a definitive randomised controlled trail in a clinical setting. The findings are dramatic and underscore the need for music therapy to be made available as a mainstream treatment option. For a long time, we have relied on anecdotal evidence and small-scale research findings about how well music therapy works. Now we have robust clinical evidence to show its beneficial effects. I would like to record my gratefulness to the Big Lottery Fund for its vision in providing the resources for this research to be carried out”.

The research team will now look at the data to establish how cost effective music therapy is in relation to other treatments.

Abstract

Music therapy for children and adolescents with behavioural and emotional problems: a randomised controlled trial

Background

Although music therapy (MT) is considered an effective intervention for young people with mental health needs, its efficacy in clinical settings is unclear. We therefore examined the efficacy of MT in clinical practice.

Methods

Two hundred and fifty-one child (8–16 years, with social, emotional, behavioural and developmental difficulties) and parent dyads from six Child and Adolescent Mental Health Service community care facilities in Northern Ireland were randomised to 12 weekly sessions of MT plus usual care [n = 123; 76 in final analyses] or usual care alone [n = 128; 105 in final analyses]. Follow-up occurred at 13 weeks and 26 weeks postrandomisation. Primary outcome was improvement in communication (Social Skills Improvement System Rating Scales) (SSIS) at 13 weeks. Secondary outcomes included social functioning, self-esteem, depression and family functioning.

Results

There was no significant difference for the child SSIS at week 13 (adjusted difference in mean 2.4; 95% CI −1.2 to 6.1; p = .19) or for the guardian SSIS (0.5; 95% CI −2.9 to 3.8; p = .78). However, for participants aged 13 and over in the intervention group, the child SSIS communication was significantly improved (6.1, 95% CI 1.6 to 10.5; p = .007) but not the guardian SSIS (1.1; 95% CI −2.9 to 5.2; p = .59). Overall, self-esteem was significantly improved and depression scores were significantly lower at week 13. There was no significant difference in family or social functioning at week 13.

Conclusions

While the findings provide some evidence for the integration of music therapy into clinical practice, differences relating to subgroups and secondary outcomes indicate the need for further study. ISRCTN Register; ISRCTN96352204.

“Music therapy for children and adolescents with behavioural and emotional problems: a randomised controlled trial” by Sam Porter, Tracey McConnell, Katrina McLaughlin, Fiona Lynn, Christopher Cardwell, Hannah-Jane Braiden, Jackie Boylan, Valerie Holmes, and On behalf of the Music in Mind Study Group in Journal of Child Psychology and Psychiatry. Published online October 27 2016 doi:10.1111/jcpp.12656


ABOUT THIS PSYCHOLOGY RESEARCH ARTICLE

Source: Bournemouth University 
Original Research: Full open access research for “Music therapy for children and adolescents with behavioural and emotional problems: a randomised controlled trial” by Sam Porter, Tracey McConnell, Katrina McLaughlin, Fiona Lynn, Christopher Cardwell, Hannah-Jane Braiden, Jackie Boylan, Valerie Holmes, and On behalf of the Music in Mind Study Group in Journal of Child Psychology and Psychiatry. Published online October 27 2016 doi:10.1111/jcpp.12656

NOVEMBER 5, 2016


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Blueberries May Help Reduce Your Risk Of Alzheimer’s Disease: It’s All About The Anthocyanins

Blueberries deliver the most delicious wallop of vitamin C found on the planet (in my humble opinion). One serving supplies 25 percent of your daily C requirement plus additional heart-healthy fiber and manganese, important to bone health. A super-achiever when it comes to antioxidant strength, this fruit may also lower your risk of heart disease, cancer, and, new research suggests, even Alzheimer’s disease.

A team of University of Cincinnati scientists led by Dr. Robert Krikorian says the healthful antioxidants within blueberries provide a real benefit in improving memory and cognitive function in some older adults. Based on their work, they believe adding blueberries to your diet may help you prevent neurocognitive decline.

Blueberries acquire their deep color from anthocyanins, a type of flavonoid that acts as an antioxidant within the fruit, explains the U.S. Highbush Blueberry Council. Generally, antioxidants help to prevent age-related damage at the cellular level within the plants. While some scientists believe consuming foods rich in antioxidants will help delay aging, not all scientists, including those at the National Institutes of Health, entirely support that theory.

Still, eating a diet rich in fruits and veggies is unquestionably good for your health with many scientists analyzing and testing specific foods to understand whether they might prevent a particular illness. Quite a few studies, Krikorian and his colleagues note, have found blueberries beneficial in preventing dementia.

 

blueberries
Anthocyanins within blueberries provide a real benefit in improving memory
and cognitive function in some older adults: study.

Silver Tide
One type of dementia, Alzheimer’s disease, causes problems with memory, thinking, and behavior. This neurodegenerative disorder develops in a healthy brain, its symptoms appearing slowly and then worsening over time. Eventually, this disease becomes severe enough to interfere with daily tasks and in the end disrupts even the autonomic nervous system, which controls heart rate and breathing. If they live long enough, Alzheimer’s patients die because their breathing stops. Currently 5.3 million Americans suffer from Alzheimer’s disease, yet as the nation’s population grows older, that number will almost inevitably rise. The Alzheimer’s Association calculates that the number of Americans with this disorder will reach more than seven million by 2025.

How can science slow this trend?

Following up on earlier clinical trials showing blueberries boost cognitive performance, Krikorian and colleagues conducted two new studies. The first involved 47 adults, 68 years old or older and beginning to show signs of mild cognitive impairment — a risk factor for Alzheimer’s. First, the researchers conducted tests and a brain scan for each participant. Then, after forming two groups, one group of participants ate a placebo powder once a day for 16 weeks, while the other consumed a freeze-dried blueberry powder (equivalent to a single cup of berries).

Conducting the same tests and comparing the groups, Krikorian and his colleagues observed comparative improvement in cognitive performance and brain function among the adults who ate blueberry powder.

“The blueberry group demonstrated improved memory and improved access to words and concepts,” said Krikorian in a statement to the press. Additionally, a second scan showed increased activity in the brains of those in the blueberry group.

The team’s second study included 94 people between the ages of 62 and 80, all confessing to some memory problems. The researchers believed these participants to be in better cognitive “shape” than the first group, however no objective measurements verified this. For this study, the researchers divided the participants into four groups. Each group received either blueberry powder, fish oil, fish oil and powder, or placebo.

A hoped-for replication of the first study did not occur. Cognition proved somewhat better for those taking either blueberry powder or fish oil separately, yet memory barely improved, certainly not as much as in the first study, Krikorian noted. Even the scans showed similar lukewarm results. The team believes participants’ less severe cognitive impairments contributed to this weakened effect.

Blueberries may not show measurable benefit for those with minor memory issues or who have not yet developed cognitive problems, the combined results of the two studies suggest. Perhaps blueberries effectively treat only those patients who already show signs of mental impairment.

Nevertheless, Krikorian says, the very same ingredient that bestows color may provide blueberries with their brain benefits; in past animal studies, scientists have shown anthocyanins improve cognition.

By Susan Scutti      Mar 13, 2016
 
source:    Krikorian R, et al. Blueberry Fruit Supplementation in Human Cognitive Aging.
Meeting of the American Chemical Society. 2016.


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The Food Flavouring That Causes Dementia

90% use too much of a flavouring that can cause inflammation of blood vessels in the brain.

A high-salt diet is linked to dementia, new research finds.

Salt causes the delicate lining of the brain’s blood vessels to inflame, because of signals sent from the gut.

Fully 90% of Americans consume above the recommended dietary maximum of 2,300 mg per day.

Dr Costantino Iadecola, study co-author, said:

“We discovered that mice fed a high-salt diet developed dementia even when blood pressure did not rise.
This was surprising since, in humans, the deleterious effects of salt on cognition were attributed to hypertension.”

The effect was quickly reversed by lowering salt intake.

The conclusions come from a study in which mice were fed a high-salt diet that is equivalent to a high-salt diet in humans.

Subsequently, the mice had much worse cognitive function.

Their brains showed 28% less activity in the cortex and 25% less in the hippocampus.

They had problems getting around a maze and did not show the usual interest in new objects placed in their cage.

They also had poorer blood flow in their brains and the integrity of the blood vessels there was worse.

However, these changes were reversed once the mice were returned to a normal diet.

The scientists found that these changes had nothing to do with higher blood pressure.

Worse cognitive functioning in the mice was seen even when the mice had normal blood pressure.

They were the result of signals sent from the gut to the brain.

These activated an immune response in the brain which increased levels of interleukin-17.

This eventually resulted in the inflammation of the delicate lining of the brain’s blood vessels.

The study was published in the journal Nature Neuroscience (Faraco et al., 2018).
source: PsyBlog


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Lack Of Rem Sleep Tied To Increased Risk Of Dementia

(Reuters Health) – People who spend less time in deep, rapid eye movement (REM) sleep may be more likely to develop dementia than individuals who get better quality rest, a recent study suggests.

Patients with dementia often have difficulty sleeping, but previous research has offered a mixed picture of which comes first – the cognitive decline or the sleep deficit.

For the current study, researchers examined data from overnight sleep studies for 321 adults age 60 or older who didn’t have dementia. After an average follow-up of 12 years, 32 people developed dementia.

Each percentage reduction in the time people spent in REM sleep was associated with a 9 percent increase in the risk of dementia, researchers report in Neurology.

“We observe an association between sleep and dementia but cannot determine whether reduced REM causes dementia,” said lead study author Matthew Pase of Swinburne University in Australia.

“It is unclear whether increasing REM sleep reduces dementia risk,” Pase, who did the research as part of the Framingham Heart Study at Boston University, said by email. “However, good quality sleep is clearly important for overall health and well-being and the emerging picture suggests that sleep and dementia may influence each other.”

Overall, study participants spent about 20 percent of their sleeping time in REM sleep, the sleep analysis found. But the subset of people who went on to develop dementia spent only 17 percent of their sleep time in REM sleep.

Out of all the dementia cases found in the current study, 25 percent occurred within the first 6.6 years of follow-up. The total included 24 instances of Alzheimer’s disease, the most common form of dementia.

Reduced REM was associated with similar increases in the risk of both Alzheimer’s and other dementia cases.

Researchers also looked at what’s known as sleep latency, or how long it takes to fall asleep, and didn’t find this related to the risk of developing dementia.

The study is small, and the results would need to be confirmed by more research in larger groups of people, said Dr. Eric Larson, vice president for research at Kaiser Permanente Washington and a professor at the University of Washington in Seattle.

But that doesn’t mean people should ignore the importance of REM sleep.

“REM sleep is considered the part of the sleep cycle where our brains get rejuvenated,” Larson, who wasn’t involved in the study, said by email. “It’s considered the best part of sleep from a perspective of gaining the rest that restores well-being.”

Other research has linked both insomnia and a nighttime breathing disorder known as sleep apnea with an increased risk of dementia, noted Dr. Kristine Yaffe, a psychiatry and neurology researcher at the University of California, San Francisco who wasn’t involved in the study.

“This adds to the growing science that sleep health or quality is related to brain health,” Yaffe said by email. “It is important to tell your doctor about concerns about your sleep and follow good sleep hygiene practices.”

Lisa Rapaport      SOURCE: bit.ly/2xMYjve      Neurology, online     August 23, 2017     reuters.com


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The Case For Drinking Coffee Is Stronger Than Ever

There are few things more more ritualistic—and to many, more sacred—than a morning cup of joe. 64% of Americans drink at least one cup a day—a statistic that’s barely budged since the ’90s. Despite warnings from doctors over the years that coffee may be hard on the body, people have remained devoted to the drink.

Luckily for them, the latest science is evolving in their favor. Research is showing that coffee may have net positive effects on the body after all.

Is coffee bad for you?

For years, doctors warned people to avoid coffee because it might increase the risk of heart disease and stunt growth. They worried that people could become addicted to the energy that high amounts of caffeine provided, leading them to crave more and more coffee as they became tolerant to higher amounts of caffeine. Experts also worried that coffee had damaging effects on the digestive tract, which could lead to stomach ulcers, heartburn and other ills.

All of this concern emerged from studies done decades ago that compared coffee drinkers to non-drinkers on a number of health measures, including heart problems and mortality. Coffee drinkers, it seemed, were always worse off.

But it turns out that coffee wasn’t really to blame. Those studies didn’t always control for the many other factors that could account for poor health, such as smoking, drinking and a lack of physical activity. If people who drank a lot of coffee also happened to have some other unhealthy habits, then it’s not clear that coffee is responsible for their heart problems or higher mortality.

That understanding has led to a rehabilitated reputation for the drink. Recent research reveals that once the proper adjustments are made for confounding factors, coffee drinkers don’t seem have a higher risk for heart problems or cancer than people who don’t drink coffee. Recent studies also found no significant link between the caffeine in coffee and heart-related issues such as high cholesterol, irregular heartbeats, stroke or heart attack.

Is coffee good for you?

Studies show that people who drink coffee regularly may have an 11% lower risk of developing type 2 diabetes than non-drinkers, thanks to ingredients in coffee that can affect levels of hormones involved in metabolism.

In a large study involving tens of thousands of people, researchers found that people who drank several cups a day—anywhere from two to four cups—actually had a lower risk of stroke. Heart experts say the benefits may come from coffee’s effect on the blood vessels; by keeping vessels flexible and healthy, it may reduce the risk of atherosclerosis, which can cause heart attacks.

It’s also high in antioxidants, which are known to fight the oxidative damage that can cause cancer. That may explain why some studies have found a lower risk of liver cancer among coffee drinkers.

Coffee may even help you live longer. A recent study involving more than 208,000 men and women found that people who drank coffee regularly were less likely to die prematurely than those who didn’t drink coffee. Researchers believe that some of the chemicals in coffee may help reduce inflammation, which has been found to play a role in a number of aging-related health problems, including dementia and Alzheimer’s. Some evidence also suggests that coffee may slow down some of the metabolic processes that drive aging.

One downside is that people may become dependent on caffeine (no surprise to any regular caffeine-drinker who takes a coffee break). The symptoms—headaches, irritability and fatigue—can mimic those of people coming off of addictive drugs. Yet doctors don’t consider the dependence anywhere close to as worrisome as addictions to habit-forming drugs like opiates. While unpleasant, caffeine “withdrawal” symptoms are tolerable and tend to go away after a day or so.

How much coffee is safe?

Like so many foods and nutrients, too much coffee can cause problems, especially in the digestive tract. But studies have shown that drinking up to four 8-ounce cups of coffee per day is safe. Sticking to those boundaries shouldn’t be hard for coffee drinkers in the U.S., since most drink just a cup of java per day.Moderation is key. But sipping coffee in reasonable amounts just might be one of the healthiest things you can do.

Alice Park   May 05, 2017    TIME 
source: time.com