Credit: David Pohl
The strategies for living a long and healthy life are well known and relatively simple, if not always easily executed: Maintain an appropriate weight. Eat the right foods. Exercise. Limit stress.
Somewhat less has been known, or said, about ways to keep the mind fit for the duration. But that's changing.
"As people are living longer, this is becoming a huge issue," said Dr. Gary Small, director of the UCLA Longevity Center at the Semel Institute for Neuroscience and Human Behavior and the Parlow-Solomon Professor on Aging at the David Geffen School of Medicine. Age is the greatest risk factor for developing cognitive decline.
More than past generations, the graying baby boomers tend to be proactive in looking for ways to take charge of their health, said Small, whose latest book, "2 Weeks to a Younger Brain," co-authored with Gigi Vorgan, is scheduled for publication in April. And amid growing reports about how the choices we make can reduce our risk of cognitive decline, the boomers are listening. In a 2013 collaboration with the Gallup polling organization, Small and colleagues found that the older a person was, the more likely he or she sought to live a brain-healthy lifestyle. "The message is getting through that we do have some control over our brain health as we age," he said.
Not complete control, of course. A widely cited MacArthur Foundation study concluded that genetics account for approximately one-third of cognitive and physical well-being in aging. But Small pointed out that this leaves ample room for what we can control—strategies for remaining sharp and lowering the odds of dementia in late life.
Trim the Fat
Carrying excess weight during middle age raises the risk of dementia down the road—by as much as double for people who are overweight, and quadruple for those who are obese. Although the reasons aren't entirely clear, Small noted that the fat tissue in the abdomen appears to increase inflammation throughout the body, including the brain, and an overactive inflammatory system may be contributing to age-related cognitive decline. For example, the amyloid plaques that are hallmarks of the Alzheimer's disease-ravaged brain show evidence of inflammation. Being overweight or obese also paves the way toward conditions such as high cholesterol, hypertension and diabetes, which can attack the brain in other ways. On an optimistic note for those determined to shed those excess pounds, recent studies have found significant improvements in the cognitive performance of obese individuals just a few months after they've undergone bariatric weight-loss surgery.
Brain Food
Many of the same foods known to be good for the body might also help to protect the brain. Studies suggest that a diet rich in omega-3 fats (including fish, flaxseed, walnuts) and low in omega-6 fats (red meat, whole milk, butter) can reduce the risk of cognitive decline. Omega-9 fats (olive oils, avocados, nuts) are also desirable. Colorful fruits and leafy vegetables are thought to be brain-healthy, too, because of their ability to reduce the oxidative stress associated with aging. Finally, Small recommended minimizing or avoiding processed foods and refined sugars.
Being of Sound Body and Mind
When it comes to strategies for keeping the brain healthy, perhaps the strongest scientific evidence is in the area of exercise, particularly cardiovascular conditioning. When you're working up a sweat, the heart pumps oxygen and nutrients to the brain cells. The body then produces something called brain-derived neurotrophic factor, which Small likened to fertilizer for the neurons, causing them to sprout the tentacles that connect brain cells. Exercise can also elevate mood, which is good for the brain. "You don't have to become a triathlete," Small said: One study found that walking briskly 90 minutes a day is enough to lower the risk for Alzheimer's disease.
Sleep Tight
Among its other benefits, sleep has been found to be anti-inflammatory, Small noted. It can also bolster the brain by improving mood and reducing the effects of depression.
Address Stress, Treat Depression
Animal studies have shown that chronic stress can cause atrophy of the brain's hippocampal memory centers; in studies of human volunteer subjects, an injection of cortisol—a stress hormone—temporarily impairs memory. People who are prone to depression have higher rates of Alzheimer's disease, Small said, adding, "It's important to get appropriate treatment." The good news: "We are learning that stress-management techniques, in addition to improving mood, can actually rewire the brain and improve mental performance."
Good Thinking
Evidence is also mounting in support of the concept that lifelong mental stimulation improves cognitive performance and may lower the risk of dementia. In a study he called "Your Brain on Google," Small used imaging techniques to demonstrate that while an older person is searching online, the brain shows a significant increase in neural activity. Other studies by Small's team have found that through memory training, the brain becomes more efficient—performing better even when there's less neural activity. "We also know that if you speak several languages, you have a lower risk for Alzheimer's disease, and if you complete college you have a lower risk," he said. "It's hard to prove that there's a cause-and-effect relationship, but I think there's enough evidence to conclude that it's good for your brain to stay mentally engaged."
It's Never Too Early—or Too Late—to Start
Most people don't start worrying about age-related cognitive decline before middle age, but Small suggested that these strategies can and should begin much earlier. "We think there is probably a cumulative effect—the longer you do it, the greater the benefit," he said. "And the sooner you get on a brain-healthy lifestyle, the easier it will be to continue it throughout your life." On the other hand, if you're kicking yourself for having whiled away the years without tackling a single New York Times crossword puzzle, relax. "It's never too late to start with these mental training activities," Small said. "The brain is very resilient. We see remarkable results in older people."
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Credit: David Pohl
The strategies for living a long and healthy life are well known and relatively simple, if not always easily executed: Maintain an appropriate weight. Eat the right foods. Exercise. Limit stress.
Somewhat less has been known, or said, about ways to keep the mind fit for the duration. But that's changing.
"As people are living longer, this is becoming a huge issue," said Dr. Gary Small, director of the UCLA Longevity Center at the Semel Institute for Neuroscience and Human Behavior and the Parlow-Solomon Professor on Aging at the David Geffen School of Medicine. Age is the greatest risk factor for developing cognitive decline.
More than past generations, the graying baby boomers tend to be proactive in looking for ways to take charge of their health, said Small, whose latest book, "2 Weeks to a Younger Brain," co-authored with Gigi Vorgan, is scheduled for publication in April. And amid growing reports about how the choices we make can reduce our risk of cognitive decline, the boomers are listening. In a 2013 collaboration with the Gallup polling organization, Small and colleagues found that the older a person was, the more likely he or she sought to live a brain-healthy lifestyle. "The message is getting through that we do have some control over our brain health as we age," he said.
Not complete control, of course. A widely cited MacArthur Foundation study concluded that genetics account for approximately one-third of cognitive and physical well-being in aging. But Small pointed out that this leaves ample room for what we can control—strategies for remaining sharp and lowering the odds of dementia in late life.
Trim the Fat
Carrying excess weight during middle age raises the risk of dementia down the road—by as much as double for people who are overweight, and quadruple for those who are obese. Although the reasons aren't entirely clear, Small noted that the fat tissue in the abdomen appears to increase inflammation throughout the body, including the brain, and an overactive inflammatory system may be contributing to age-related cognitive decline. For example, the amyloid plaques that are hallmarks of the Alzheimer's disease-ravaged brain show evidence of inflammation. Being overweight or obese also paves the way toward conditions such as high cholesterol, hypertension and diabetes, which can attack the brain in other ways. On an optimistic note for those determined to shed those excess pounds, recent studies have found significant improvements in the cognitive performance of obese individuals just a few months after they've undergone bariatric weight-loss surgery.
Brain Food
Many of the same foods known to be good for the body might also help to protect the brain. Studies suggest that a diet rich in omega-3 fats (including fish, flaxseed, walnuts) and low in omega-6 fats (red meat, whole milk, butter) can reduce the risk of cognitive decline. Omega-9 fats (olive oils, avocados, nuts) are also desirable. Colorful fruits and leafy vegetables are thought to be brain-healthy, too, because of their ability to reduce the oxidative stress associated with aging. Finally, Small recommended minimizing or avoiding processed foods and refined sugars.
Being of Sound Body and Mind
When it comes to strategies for keeping the brain healthy, perhaps the strongest scientific evidence is in the area of exercise, particularly cardiovascular conditioning. When you're working up a sweat, the heart pumps oxygen and nutrients to the brain cells. The body then produces something called brain-derived neurotrophic factor, which Small likened to fertilizer for the neurons, causing them to sprout the tentacles that connect brain cells. Exercise can also elevate mood, which is good for the brain. "You don't have to become a triathlete," Small said: One study found that walking briskly 90 minutes a day is enough to lower the risk for Alzheimer's disease.
Sleep Tight
Among its other benefits, sleep has been found to be anti-inflammatory, Small noted. It can also bolster the brain by improving mood and reducing the effects of depression.
Address Stress, Treat Depression
Animal studies have shown that chronic stress can cause atrophy of the brain's hippocampal memory centers; in studies of human volunteer subjects, an injection of cortisol—a stress hormone—temporarily impairs memory. People who are prone to depression have higher rates of Alzheimer's disease, Small said, adding, "It's important to get appropriate treatment." The good news: "We are learning that stress-management techniques, in addition to improving mood, can actually rewire the brain and improve mental performance."
Good Thinking
Evidence is also mounting in support of the concept that lifelong mental stimulation improves cognitive performance and may lower the risk of dementia. In a study he called "Your Brain on Google," Small used imaging techniques to demonstrate that while an older person is searching online, the brain shows a significant increase in neural activity. Other studies by Small's team have found that through memory training, the brain becomes more efficient—performing better even when there's less neural activity. "We also know that if you speak several languages, you have a lower risk for Alzheimer's disease, and if you complete college you have a lower risk," he said. "It's hard to prove that there's a cause-and-effect relationship, but I think there's enough evidence to conclude that it's good for your brain to stay mentally engaged."
It's Never Too Early—or Too Late—to Start
Most people don't start worrying about age-related cognitive decline before middle age, but Small suggested that these strategies can and should begin much earlier. "We think there is probably a cumulative effect—the longer you do it, the greater the benefit," he said. "And the sooner you get on a brain-healthy lifestyle, the easier it will be to continue it throughout your life." On the other hand, if you're kicking yourself for having whiled away the years without tackling a single New York Times crossword puzzle, relax. "It's never too late to start with these mental training activities," Small said. "The brain is very resilient. We see remarkable results in older people."
Explore further: Exercise key to warding off dementia
Medical Xpress on facebook
Related Stories
Exercise key to warding off dementia
Exercise is one of the best ways to protect against dementia in later life and the earlier you start, the greater the effect, research suggests.
Study examines memory and effects on the aging brain
A study of brain aging finds that being male was associated with worse memory and lower hippocampal volume in individuals who were cognitively normal at baseline, while the gene APOE ?4, a risk factor for Alzheimer disease, ...
Healthy eating, exercise, and brain-training
A comprehensive programme providing older people at risk of dementia with healthy eating guidance, exercise, brain training, and management of metabolic and vascular risk factors appears to slow down cognitive decline, according ...
Better midlife fitness may slow brain aging
People with poor physical fitness in their 40s may have lower brain volumes by the time they hit 60, an indicator of accelerated brain aging, according to new research presented at the American Heart Association EPI/Lifestyle ...
Pumping iron could ward off dementia
High intensity weight training is important for brains not just brawn and could be prescribed in the fight against dementia according to new research from the University of Sydney.
Recommended for you
Potential new drug target may protect against certain neurodegenerative diseases
Penn Medicine researchers have discovered that hypermethylation - the epigenetic ability to turn down or turn off a bad gene implicated in 10 to 30 percent of patients with Amyotrophic Lateral Sclerosis (ALS) ...
Power naps produce a significant improvement in memory performance
A team of researchers at Saarland University headed by Professor Axel Mecklinger have shown that a short nap lasting about an hour can significantly improve memory performance. The study, which was coordinated ...
Having a purpose in life may improve health of aging brain
Having a strong sense that your life has meaning and direction may make you less likely to develop areas of brain damage caused by blockages in blood flow as you age. This research is reported in the American ...
America's aging population will require more neurosurgeons for increased brain bleeds
By 2030, chronic subdural hemorrhage (SDH) will be the most common adult brain condition requiring neurosurgical intervention in the U.S., according to a new study conducted by researchers at NYU Langone Medical Center. And ...
New assessment tool helps predict risk of cognitive decline
(HealthDay)—A new assessment tool may be able to predict risk of mild cognitive impairment (MCI) in older adults, according to a study published online March 18 in Neurology.
Altering brain chemistry makes us more sensitive to inequality
What if there were a pill that made you more compassionate and more likely to give spare change to someone less fortunate? UC Berkeley scientists have taken a big step in that direction.
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