Researchers from Massachusetts General Hospital have found that higher levels of daily physical activity may protect against cognitive decline and brain tissue loss in adults who are believed to be at greater risk for Alzheimer’s disease. The best results were found among the research participants who took more than 8,900 steps per day.
Traci Pedersen, writing in PsychCentral:
“One of the most striking findings from our study was that greater physical activity not only appeared to have positive effects on slowing cognitive decline, but also on slowing the rate of brain tissue loss over time in normal people who had high levels of amyloid plaque in the brain,” said Jasmeer Chhatwal, M.D., Ph.D. of the MGH Department of Neurology, and corresponding author of the study.
The results suggest that physical activity might reduce b-amyloid (Ab)-related cortical thinning and preserve gray matter structure in regions of the brain that have been associated with episodic memory loss and Alzheimer’s-related neurodegeneration.
The underlying processes of Alzheimer’s disease can begin decades before clinical symptoms appear and is characterized by early accumulation of b-amyloid protein.
The new study is among the first to demonstrate the protective effects of physical activity and vascular risk management in the preclinical stage of Alzheimer’s disease, while there is an opportunity to intervene prior to the onset of substantial neuronal loss and clinical impairment.
“Because there are currently no disease-modifying therapies for Alzheimer’s disease, there is a critical need to identify potential risk-altering factors that might delay progression of the disease,” Chhatwal said.
The new research published in the journal JAMA Neurology.
It’s never too late to start exercising. Even if you already have have a serious chronic condition.
Lisa Rapaport, writing for Reuters Health »
… researchers assessed activity levels several times over eight years for 14,599 men and women who were between 40 and 80 years old at the outset. After the first eight years, researchers started tracking mortality for another 12.5 years, on average. During that period, there were 3,148 deaths, including 950 from cardiovascular disease and 1,091 from cancer.
The researchers measured both work and leisure-time physical activity in terms of energy expended per kilogram of body weight. Activity increases over time that were equivalent to going from sedentary to meeting the World Health Organization’s recommendation of at least 150 minutes a week of moderate physical activity were associated with a 24% lower risk of death from any cause, a 29% lower risk of cardiovascular death and an 11% lower risk of cancer death compared to those who remained inactive.
“This sends a strong message to all of us, irrespective of what our current life circumstances may be, since it is never too late to build physical activity into your daily routine in order to enjoy a longer healthier life,” said Soren Brage, senior author of the study and a researcher at the University of Cambridge in the UK.
“Everybody benefitted from becoming more active,” Brage said by email. “This was also true for the subgroup of people who already had a serious chronic condition such as heart disease and cancer at baseline.”
Read the whole story …
Stephen Harridge & Norman Lazarus writing for the BBC:
The greater health of older exercisers compared to their sedentary counterparts can lead people to believe physical activity can reverse or slow down the ageing process.
But the reality is that these active older people are exactly as they should be.
In our distant past we were hunter-gatherers, and our bodies are designed to be physically active.
So, if an active 80-year-old has a similar physiology to an inactive 50-year-old, it is the younger person who appears older than they should be, not the other way around.
Through all phases of life, Canada and Scandinavian countries treat their citizens well, according to US News.
Best Countries for Quality of Life
- New Zealand
- United Kingdom
- South Korea
- Czech Republic
More info at US News
Reserch has shown that getting fit in middle age could be as good for you as starting young when it comes to reducing the risk of an early death. But the reverse is also true.
If you have been fit and drop off in later years, there is no difference in the risk of an early death when compared to those who had always been couch potatoes. In other words, there’s no bank, no accumulation of the protective effect of exercise and for having been fit in younger years.
Nicola K S Davis, writing at The Guardian:
“If you are not active and you get to your 40s-50s and you decide to become active, you can still enjoy a lot of those benefits.”
The study, published in the journal Jama Network Open, was based on data from more than 300,000 Americans aged 50-71 who undertook a questionnaire in the mid-1990s. They were asked to estimate the extent of their moderate to vigorous leisure exercise at different stages of their life. Researchers then used national records to track who died in the years up to the end of 2011, and from what.
After taking into account factors including age, sex, smoking and diet, the team found that those who were exercising into middle age had a lower risk of death from any cause in the years that followed than those who had never carried out any leisure exercise. However, when the team looked at 10 different patterns in the way people were active over their life, it found a surprise.
Men and women who ramped up their activity gradually to about seven hours a week by the age of 40-61 reduced their risk of death from any cause in the years that followed by about 35%. The benefit was similar to that seen for people who reached and maintained similar activity from their teens or 20s onwards, or who exercised at such a level when young and middle-aged but dipped in activity in their 30s.
There is no magic shield against Alzheimer’s disease and other dementias. Supplements don’t work. Yet there is evidence that some strategies may help.
Paula Span at the New York Times writes:
- Increased physical activity;
- Blood pressure management for people with hypertension, particularly in midlife;
- And cognitive training.
That last recommendation doesn’t necessarily refer to commercial online brain games, said Dr. Kristine Yaffe, a neuropsychiatrist and epidemiologist at the University of California, San Francisco, who served on the panel.
“It’s really the concept of being mentally active,” she said. “Find something you enjoy where you’re learning something new, challenging and stimulating your brain.”
Though the evidence to date doesn’t establish which mental workouts have the greatest impact or how often people should engage in them, “they’re not expensive and they don’t cause side effects,” Dr. Yaffe pointed out.
The blood pressure recommendation got a boost in January with the latest findings from the Sprint trial, a multisite study stopped early in 2015 when intensive treatment of hypertension (a systolic blood pressure goal of less than 120, compared to the standard 140) was shown to reduce cardiovascular events and deaths.
It’s been repeatedly shown that sleep is essential to how we form memories.
The human brain requires we sleep roughly one third of every day to properly process and store thoughts so they can be remembered at a later time. Depriving ourselves of sleep, especially over the long term, can disrupt this process. And it can make learning more difficult.
Researchers at the Sleep Research Laboratory at the University of Ottawa have found that once you drift off, your brain shifts information from the hippocampus, which is only used to store recent memories, to the prefrontal cortex. It’s how we learn new things, and remember them for the future.
A short night of sleep may translate into learning less. Our brain requires suffecient time to store everything it took in during the day. Researchers say it’s clear that if you want to be smarter, you may need to sleep more.
Read More at CBC
According to 2017 data, the life expectancy for Americans fell again. It’s now 78.6 years, down three-tenths of a year since 2014.
Economists consider life expectancy to be an important measure of a nation’s prosperity, but last year’s data paints a darker picture of health in the U.S.
One of the reasons for the drop is the sharpest annual increase in suicides in nearly a decade and a continued rise in deaths from opioid drugs.
Life expectancy for Americans fell again last year, despite growing recognition of the problems driving the decline and federal and local funds invested in stemming them.
Data the Centers for Disease Control and Prevention released on Thursday show life expectancy fell by one-tenth of a year, to 78.6 years, pushed down by the sharpest annual increase in suicides in nearly a decade and a continued rise in deaths from powerful opioid drugs like fentanyl. Influenza, pneumonia and diabetes also factored into last year’s increase.
Read more at the Wall Street Journal (paywall)