Getting a good night’s sleep of more than five hours can help older people avoid developing multiple chronic illnesses, a new study suggests. Photo by Wokandapix/Pixabay
Oct. 18 (UPI) — Older people who get five hours of sleep a night or less may face a far greater risk of developing two or more chronic illnesses, such as heart disease, cancer or diabetes, compared to people who sleep longer, a new study suggests.
The research, published Tuesday in the journal PLOS Medicine, tracked the impact of sleep duration on the health of more than 7,000 men and women at the ages of 50, 60 and 70.
This was done via a 25-year follow up of participants in the Whitehall II cohort study involving members of the British civil service.
The British and French researchers, led by University College London, found that sleeping for five hours or less at the ages of 50, 60, and 70 was linked to a 30% to 40% increased risk of developing multiple chronic diseases versus people who slept for up to seven hours.
The investigators also examined the relationship between each participant’s length of nightly sleep and mortality. They found that nightly sleep that lasted five hours or less at age 50 was associated with a 25% increased risk of death over the 25 years of follow-up.
This is primarily because short sleep duration increases the risk of chronic illness that in turn increases the risk of death, the release said.
The scientists also analyzed whether sleeping for nine hours or more affected health outcomes, but they found no clear link between this sleep duration and developing chronic diseases for healthy people at age 50.
However, for those individuals already diagnosed with a chronic condition, such long sleep was associated with roughly a 35% increased risk of developing another illness, possibly due to underlying health conditions affecting sleep, they said.
“As people get older, their sleep habits and sleep structure change. However, it is recommended to sleep for seven to eight hours a night — as sleep durations above or below this have previously been associated with individual chronic diseases,” Séverine Sabia, the study’s lead author said in the release.
A researcher/epidemiologist at University College London’s Institute of Epidemiology & Health and at Inserm, Université Paris Cité, Sabia advised having good sleep hygiene, such as ensuring the bedroom is quiet, dark and a comfortable temperature before going to bed.
She also suggested avoiding large meals before bedtime.
The study used self-reported data on sleep, which the researchers noted is likely to be subject to reporting bias.
Sponsors of the research included the National Institute on Aging, a part of the National Institutes of Health, the U.K. Medical Research Council and the British Heart Foundation.
If you struggle with sleep, chances are you’ve tried it all: eye masks, reducing nighttime screen time, guided meditations, and more. But did you know nutrition can be another tool to help you slumber?
Sweet potatoes, in particular, are a lovely little package of good carbs and sleep-promoting micronutrients. While it may seem like a strange pick, there are a few reasons why potatoes are some of the best foods to eat for better sleep.
1. POTATOES HELP STABILIZE BLOOD SUGAR
A study in the Journal of Sleep Research found carbohydrates were associated with less difficulty staying asleep—but only complex carbohydrates. Complex carbs are carbs composed of fibers and starches (think: the kind you find in whole plant foods such as potatoes and other veggies, legumes, and whole grains). They digest more slowly than the simple carbs present in sugary foods, refined grains, and baked goods. This means complex carbs lead to a slower, steadier rise and fall in blood sugar, not the type of blood sugar surge and subsequent drop that interferes with sleep.
Sugary foods and refined carbs, on the other hand, can cause a blood sugar spike and subsequent drop about four hours later—and this drop is associated with increased production of the neurotransmitter norepinephrine, which promotes alertness. Translation: Not a recipe for good sleep.
2. POTATOESHELP YOUR BODY PREPARE FOR SLEEP
Sweet potatoes still have a moderate impact on blood sugar, but that isn’t a bad thing. In fact, the nutrients they contain make them one of the best tryptophan foods for sleep. “They have the right amount of complex carbohydrates to elicit an insulin response that clears the way for the amino acid tryptophan to flood the brain with less competition from other amino acids,” says Judes Scharman Draughon, MS, RDN, author of 12 Fixes to Healthy. “More tryptophan in the brain helps promote more serotonin production and consequently more of the sleep-enhancing hormone melatonin.”
3. POTATOESCONTAIN SLEEP-SUPPORTING VITAMINS AND MINERALS
Think of sweet potatoes like a natural (and delicious) sleep supplement. “They have the right balance of nutrients like potassium and vitamin B6 to stimulate the production of the sleep hormones serotonin and melatonin,” says Scharman Draughon. Sweet potatoes also contain magnesium, which aids in the production of the neurotransmitter gamma-aminobutyric acid (GABA), which calms nerve activity and helps you relax.
What about white potatoes? They’re not as nutrient-rich, but as long as you’re not eating them in the form of French fries, go ahead and give them a try. “White potatoes produce similar sleep effects as sweet potatoes, but sweet potatoes contain more tryptophan than white potatoes and a nice dose of beta-carotene,” says Scharman Draughon.
HOW TO EAT POTATOES FOR BETTER SLEEP
Whatever potato you choose, don’t eat it too late in the evening. “Eating any food within 60 minutes of going to bed can negatively affect your sleep,” says Scharman Draughon. Your best bet: Incorporate it into your dinner several hours before bed, or (if you’re still hungry) have half a potato as a small late-night snack a bit closer to bedtime.
“Eating a potato for dinner or at least four hours before bed may promote better sleep than eating it an hour before bed,” Scharman Draughon says “It takes time for all these sleep-promoting reactions to occur in the body.” That said, everybody is a little different, so you may need to experiment to find your ideal potato-eating window.
And if you can stomach it, eat the potato skin, too! This provides an extra dose of fiber which promotes balanced blood sugar—and eating enough fiber every day has been associated with improved sleep. Drizzling your baked potato with a little Greek yogurt, olive oil, avocado, or almond butter—all of which provide a dose of healthy fats—helps further stabilize blood sugar and aids in the absorption of fat-soluble nutrients such as beta-carotene (which helps support healthy eyes and skin and a stronger immune system).
THE BEST FOODS FOR SLEEP
Aside from potatoes and sweet potatoes, what are some other healthy bedtime snacks? Here are five foods to eat for better sleep:
OATS
Oats are another complex carb that may have a similar sleep-promoting effect to potatoes. They also produce enough insulin to help clear the way for tryptophan to get to the brain. Plus, they contain a healthy dose of vitamin B6 and melatonin, making them one of the best bedtime snacks. but complex carbs aren’t the only way to enhance sleep.
KIWI
Craving something sweet before bed? Good news: Kiwi is one of the best snacks you can have before bedtime. That’s because they have an unusually high serotonin content, according to Scharman Draughon.
MILK
Turns out, the age-old tradition of having a glass of milk before bed holds up. According to Scharman Draughon, it’s one of the best foods for deep sleep. “Drinking milk in the evening may help you sleep, as it contains a component known as casein trypsin hydrolysate (CTH), which binds to a receptor in the brain to suppress nerve signaling and promote sleep,” she says.
CHERRIES
“Tart cherries, with their high concentration of both melatonin and antioxidant capacity, also enhance sleep,” says Scharman Draughon. In fact, research shows that tart cherry juice before bed improves both sleep duration and sleep quality. Looking for some cherry bedtime snack ideas? Consider making a simple tart cherry smoothie with frozen tart cherries, magnesium-rich almond butter, milk (or non-dairy milk such as almond milk or oat milk), and a bit of easy-to-digest protein like HUM’s plant-based vanilla protein powder, Core Strength. In addition to sleep-promoting micronutrients, this blend contains protein, complex carbs, and fats to promote stable blood sugar.
CHAMOMILE TEA
For something lighter that you can sip closer to bedtime, try chamomile tea. This cozy beverage has been shown to improve sleep quality and quell anxiety, thanks in part to an antioxidant called apigenin, which appears to promote muscle relaxation and sleepiness. For something extra dreamy, try one of these bedtime latte recipes.
KEEP IN MIND, YOUR OVERALL DIET MATTERS THE MOST
While some individual foods may offer sleep-promoting properties when consumed closer to bedtime, your overall eating pattern throughout the day is even more important.
One study in the Journal of Clinical Sleep Medicine found that even just one day of eating low fiber, high saturated fat foods negatively influenced participants’ sleep, in part, by interfering with slow wave sleep, which is considered the most restorative sleep stage. Additionally, eating a higher percentage of calories from sugar and refined carbohydrates was associated with waking up during the night, likely due to fluctuations in blood sugar.
Eating low-fiber, high-sugar, and high-saturated fat foods during the day can also drive your urge for less healthy late-night snacking, which can further interfere with sleep, says Scharman Draughon. At meals, aim for a balance of protein, high-fiber complex carbs (veggies, whole grains, certain fruits), and a healthy source of fat (olive oil, avocadoes, nuts, seeds, salmon).
THE TAKEAWAY
Potatoes, especially sweet potatoes, offer a great combination of complex carbohydrates for steady blood sugar, along with vitamins and minerals that enhance the body’s production of sleep-promoting hormones and neurotransmitters. Try incorporating them into your dinner or a small evening snack for deeper, more restful sleep. Pro tip: Half a baked sweet potato slathered with almond butter and sprinkled with cinnamon is almost like dessert.
Using a bedroom air filter that traps fine particles of pollution with diameters smaller than 2.5 micrometers can significantly improve breathing in asthmatic children, a new study in JAMA Pediatricsfound.
The research documents that physiological improvements occur in the childrens’ airways when air filters are in use, and it suggests that with consistent use, the filters may help prevent, not just alleviate, asthmatic flare-ups.
While using the filters daily for two weeks, children in the study experienced decreased airway resistance and lung inflammation and increased airway elasticity, among other benefits.
“Pharmaceutical companies have spent large amounts to develop drugs that can work on lower airways, but they are very expensive. Our results show that using an air purifier to reduce the exposure of lower airways to pollutants could help asthmatic children breathe easier without those costly drugs,” Junfeng Zhang, professor of global and environmental health at Duke University’s Nicholas School of the Environment, says in a statement.
“This warrants a clinical trial to confirm findings,” he says.
Fine particulate matter (PM2.5) is a ubiquitous air pollutant originating from fossil fuel emissions, wildfires and other biomass burning, industrial sources, and gasoline- and diesel-powered vehicles. Thirty times smaller in diameter than a human hair, the particles are easily inhaled and can penetrate deep into the small, or lower, airways where they can trigger or exacerbate asthma symptoms. Inhalers don’t help, since they are only designed to open upper airways, according to the researchers.
The scientists conducted the double-blind crossover study in a Shanghai suburb during a period of moderately high PM2.5 pollution in 2017. They gave 43 children with mild to moderate asthma two air filters to use in their bedrooms. One was a high-efficiency particulate air (HEPA) filter capable of removing PM2.5; the other was a sham filter. Each filter was used for two weeks in random order with a two-week interval in between. Neither the children nor their families knew which filter was which.
Results showed that PM2.5 concentrations inside the children’s bedrooms were a third to two-thirds lower when the real air filters were in use than when the sham ones were being used, Michael H. Bergin, professor of civil and environmental engineering at Duke’s Pratt School of Engineering, says in a statement.
This drop coincided with significant improvements in how easily air flowed in and out of the children’s small airways and lungs, Bergin says. These improvements included a 24% average reduction in total airway resistance, a 43.5% average reduction in small airway resistance, a 73.1% average increase in airway elasticity, and a 27.6% average reduction in exhaled nitric oxide, a biomarker of lung inflammation.
Although the benefits lasted only as long as the real air filters were in use, “it’s probable that if children use the filters on an ongoing daily basis they will see continued benefits,” Zhang says.
If clinical trials confirm the new study’s findings, the filters could serve as a practical preventive measure for asthma management in polluted outdoor or indoor environments worldwide, he says. They could also be lifesavers in areas near wildfires.
“Look at the high PM2.5 pollution levels that occurred in San Francisco last year as a result of smoke from the California wildfires, and at the air-quality problems happening this year from the bushfires in Australia,” he says. “People should really consider using one of these devices during wildfires.”
