Posts Tagged ‘Physical exercise’


April 24, 2019

The final chapter of iGEN: Why Today’s Super-Connected Kids are Growing up Less Rebellious, More Tolerant, Less Happy—and Completely Unprepared for Adulthood, by Jean M. Twenge, Ph.D. offers some suggestions for saving iGen.

Not surprisingly, the first is to put down the phone. She recommends parents putting off giving their children a cell phone as long as possible. There really is no reason for an elementary school child to have a cell phone. By middle school, with kids in more activities and more likely to ride a bus, many parents buy phones for their kids convenience and safety. Here she recommends providing the child with a phone with limited functions such as an old-school flip phone without Internet access or a touch screen.

She reminds readers that many tech CEOs strictly regulate their own children’s technology use. Steve Jobs’ children didn’t use the iPad. He limits how much technology their children use as home. This restriction was common around tech CEOs from the cofounder of Twitter to a former editor of Wired magazine. So the people who love technology and made a living of it are cautious about their children using it too much. Adam Alter wrote in his book “Irrestible,” “It seemed as if the people producing tech products were following the cardinal rule of drug dealing: Never get high on your own supply.”

The same goes for social media and electronic device use. They are linked to higher rates of loneliness, unhappiness, depression, and suicide risk, in both correlational and experimental data. Any readers of the healthy memory blog should be well aware of the dangers of social media.

A key rule she provides is that no one, adults included, should sleep within ten feet of a phone.

Dr, Twenge also argues that given the benefits of in-person social interaction, parents should stop thinking that teens hanging out together are wasting their time. Electronic communications are a poor substitute for the emotional connections and social skills gained in face-to-face communication.

Physical exercise is a natural antidepressant.

In the conclusion she writes, “The devices they hold in their hands have both extended their childhoods and isolated them from true human interaction. As a result, they re both the physically safest generation and the most mentally fragile. They are more focused on work and more realistic than Millenials, grasping the certainty that they’ll need to fight hard to make it. They’re exquisitely tolerant and have brought a new awareness of equality, mental health, and LGBT rights, leaving behind traditional structures such as religion. iGEN’ers have a solid basis for success, with their practical nature and they inherent caution. It they can shake themselves out of the constant clutch of their phone and shrug off the heavy cloak of their fear, they can still fly. And the rest of us will be there, cheering them on.”

Cognitive Shields Protecting Against Dementia

April 22, 2015

This post is based largely on “Cognitive Shields” by Andrew Merluzzi in the .  Psychological Science Observer (February 2015, 21-28).   There have been many previous Healthymemory blog posts about autopsies of people who have exhibited no symptoms of Alzheimer’s while alive, but who nevertheless have the so-called amyloid plaques and neurofibrillary tangles which provide the definitive basis for diagnosing the disease.  Now I have a percentage to place on this statement.  About a third of post-mortem brains with the telltale features of dementia—protein tangles or miniature strokes-came from people who never exhibited symptoms during life.

The explanation that has been offered for this is that certain individuals might build buffers over their lifetimes called cognitive reserve.  This post provides information on research on the cognitive shields that build this cognitive reserve.  Actively engaging the brain can boost older adult’s recall power.  One experiment randomly more than 200 adults (ages 60-90) to engage in a particular type of activity for 15 hours a week over the course of three months.  Some activities required significant cognitive investment such as digital photography or quilting.  The other participants engaged in more leisurely activities such as listening to classical music or completing word puzzles.  At the end of the experiment participants who engaged in digital photography or quilting showed a significant improvement in memory compared to the leisurely activity participants.

Another experiment  recruited 16 older adults to play a video game called “Neuroracer.”   Participants attempted to drive a car down a virtual road, keeping constant speed and lane position.  As they were doing this they also had to pay attention to sporadically appearing shapes, pressing a button whenever they observed a green circle.  The game became more difficult as performance improved.  The comparison group played an easier version of the game where they had to drive or pay attention to shapes, but not simultaneously.  The group who played the more difficult version of the game scored better on unrelated cognitive tests. Brain imaging with an EEG revealed noticeable differences at the neural level.  Participants who played the difficult version of the game  showed more coherent activation patterns in cognitive control networks including the prefrontal cortex.  These cognitive gains were still apparent six months later.

Physical exercise is also important as it increases the flow of oxygen to the brain.  See the healthy memory blog post “To Improve Your Memory, Build Your Hippocampus” (use the healthy memory blog search box).

Another study investigated whether exercise can induce neuroprotective effects for people who have a genetic risk for Alzheimer’s.  One hundred older adults many who carried the APOE gene which increases the risk of Alzheimer’s were studied.  The participants explained their normal exercise habits and had their brains scanned twice over a period of 18 months.  It was found that exercise was critically important for the at risk group with the APOE gene.  People with this gene who didn’t exercise exhibited a 3% decrease in hippocampal volume over time.  Those carrying the gene who did incorporate exercise into their lives—more than 15 minutes of moderate exercise at least three days a week—didn’t show any decreases in hippocampal volume.  The conjectures for this result are that staying active might reduce inflammation in the brain and promote neural growth in the hippocampus building  up cognitive and brain reserve.

Research has also found that bilingual older adults have more robust white matter then monolingual adults.  This suggests that the myelin on axons in these her bundles is more intact, which would help  to buffer against age-related changes in the size and structure of the brain.  Sone also argue that it might never be too late to learn another language.  But this does take commitment.

There are many more healthy memory blog posts on the cognitive reserve and the benefits of both cognitive and physical exercise.  It is important that this information be disseminated.  People should know that they need not be passive victims of dementia, nor should they wait for a medical treatment or vaccine to treat or prevent Alzheimer’s.  To a large exert we control our own fates and should take action.

The Benefits of Physical Exercise

June 5, 2014


This post is taken from Nurturing the Older Brain and Mind by Greenwald and Parasurman.  They write in the summary of their chapter on physical exercise, “Of the various experiential and lifestyle factors in cognitive aging, which they have reviewed in their book, physical exercise is probably the one whose effects are best understood.  They reviewed literature on non-human in addition to human subjects.  They write, “There is strong evidence that aerobic exercise can reduce and in some cases eliminate cognitive deficits associated with healthy aging.”    Exercise benefits neurogenesis and synaptic plasticity.  Neurotrophins also are produced as a result of exercise and mediate  the beneficial effects of exercise. They also note that there is a growing understanding of the neural mechanisms that underlie such benefits.  They note that the mechanisms appear to be centered on the dentate gyrus.   The dentate gyrus is important for the formation of new memories.

Although knowing the neural mechanisms of the benefits of exercise is good, many readers would like to know how much exercise is “enough.”  Unfortunately, there is little information on this topic.  All I can cite is a previous healthy memory blog post, “To Improve Your Memory, Build Your Hippocampus.”  In that study people benefited from walking briskly for 45 minutes three days a week for six months.  So there is evidence that that amount is sufficient.  So if you enjoy exercising, please do more, if you do not, try to do something of the order of 45 minutes a day for three days a week.  I have a hunch that any physical exercise one does is beneficial, but data regarding the minimum amount that is beneficial is woefully lacking.  It is good to do something you enjoy.  The feeling both doing and after a workout can be quite enjoyable.  Frankly, I find exercising easier than dieting and nutrition, to which we shall turn next.

© Douglas Griffith and, 2014. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Douglas Griffith and with appropriate and specific direction to the original content.

14-Day Brain Workout?

December 7, 2013

“14-Day Brain Workout!” is the title of an insert by Cynthia R. Green, Ph.D., to the National Geographic Complete Guide to Brain Fitness. I’ve replaced the “!” with a “?” because I am completely perplexed by the word “Day” in the title. Does she mean 14 days and your done? This insert is based on Green’s 30 Days toTotal Brain Health, which I find to be even more perplexing. Brain or memory health is a lifelong pursuit, not something that is accomplished in days. Had she substituted the “activities.” the title would be acceptable. An argument can be made that the failure to continue pursuing certain activities as we age can contribute to the development of dementia and Alzheimer’s.

Nevertheless, the healthymemory blog shall review her activities in the context of developing and maintaining a healthy memory.

Get Physical. Yes. Aerobic exercise several days a week is definitely beneficial to brain health. Just walking 45 minutes three times a week is beneficial to memory and your hippocampus (see the healthymemory blog post “To Improve Your Memory, Build Your Hippocampus”).

Tap a Tune. She write of the benefits of tapping a tune with your fingers for a few minutes a day. I really would like to see the research on which she bases this activity. I remain skeptical, particularly if it is done only a few minutes a day.

Color Your World. She encourages drawing or sketching using colored pencils. Now it is beneficial to engage in new activities, but I am skeptical if doing this only briefly will be beneficial.

Learn About Memory Loss. Here she recommends reading about Alzheimer’s. I strongly recommend reading generally about memory and how your memory works and how it fails to work. Many such posts on this topic can be found in the healthymemory blog.

Jump Some Jacks. The jacks here is in the context of jumping jacks. I would subsume this under the earlier activity of getting physical.

The Honorable Opposition. I strongly endorse this activity. This is a matter of familiarizing yourself with the opinions of others. This goes beyond brain and memory health, but also addresses the goal of being a good citizen (see the healthymemory blog post, “APS Address on The Psychological Science Behind Hyperpartisanship and What to Do About It”).

Write a Haiku. Haiku is an ancient Japanese form of verse. Although it is reasonable to think that writing poetry contributes to memory health, there is little reason to think that there is anything special about Haiku.

Take a Yoga Break. Yes. Yoga is beneficial, but there are other forms of meditation that are also beneficial (enter “meditation” into the healthymemory search box) and , “are less demanding physically.

Reorganize Your Desk. Being an inveterate slob I should recuse myself from commenting on this activity. Nevertheless, although I will admit that there are benefits to being organized, I know of no research indicating that this is beneficial to a healthy memory.

Do Something Kind. Yes, not only doing something kind but simply thinking something kind can be beneficial to health (see the healthymemory blog post “The Importance of the Vagus Nerve in Relieving Stress.”).

Learn the Symptoms of a Stroke. Yes. This is quite important. Be sure to visit the National Stroke Association website,

Doodle. Here Dr. Green does cite some research. According to a study published in Applied Cognitive Psychology research participants assigned a doodling task not only did better when quizzed on what they were monitoring in a phone call, but also did 29% better than a control group on a surprise memory test.

Hug 5 People. Yes. Hugging is good. See “Do Something Good.” Just be sure that you know the 5 people that you hug.

List 10 Ways Your Brain is Great. Indeed, Your brain is great. But you not only need to appreciate it, but you also need to build and grow it continually.

All in all, the suggestions are good. I believe more emphasis should have been spent on the importance of social interactions. And I think the benefits of specific memory improving techniques should also have been included (See the “Mnemonic Techniques” category of the healthymemory blog.

© Douglas Griffith and, 2013. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Douglas Griffith and with appropriate and specific direction to the original content.

How Physical Exercise Contributes to a Healthy Memory

January 9, 2013

Enter “exercise” into the search block on the healthymemory blog and you will find a listing of many articles. Although the majority of them are discussing the benefits of cognitive exercise, you can still find many on the benefits of physical exercise. So a reasonable question is how can physical exercise benefit memory? Research indicating how this might happened in an article1 in Scientific American Mind,which, in turn, was reporting the results from a study in the Journal of Applied Physiology. This study, conducted by J. Mark Davis and his colleagues at the University of South Carolina, used mice. They found that quantities of a signaling molecule, which they called a “master regulator” of mitochondria production increased in the brain after a half hour a day of running on a treadmill. These brain cells of the mice also had more mitochondrial DNA as distinguished from the regular cellular DNA found in the nucleus. The researchers said that this provided “gold standard” evidence of more mitochondria. Mitochondria generate energy, and these increased mitochondria provide additional energy that allow the brain to work faster and more efficiently.

As we age, neurons naturally lose mitochondria. This loss of mitochondria can contribute to losses in brain and cognitive function resulting in dementia and other age-related declines in brain function. By increasing the energy supply new mitochondria can be produced offsetting this mitochondria loss.

Although we’ve known for a long time that physical exercise is good for both physical and cognitive health, we are beginning to gain insights as to why this is the case.

1Sutherland, S. (2012). How Exercise Jogs the Brain: Physical activity boosts cognition by improving neurons’ power supply. Scientific American Mind, March/April, 12.

Walking and a Healthy Memory

February 2, 2011

The Health Day Newsletter contained an article1 summarizing a news release from the November 29, 2010 meeting of the Radiological Society of North America. The research suggests that walking about five miles a week may help slow the progression of cognitive illness among seniors already suffering from mild forms of cognitive impairment or Alzheimer’s Disease. The research also indicated that walking just six miles a week can help prevent the onset of disease.

Two appealing features leap out at me from this news. First is the cost. Walking costs nothing (unless you choose walking shoes or consider the minimal wear placed on shoes). Secondly, this is a reasonable regimen. Six miles is not excessively demanding, particularly when you consider that it can be spread out over an entire week.

3-D MRI scans were done to measure brain volume. After accounting for age, gender, body-fat composition, head size, and education, it was found that the more the individual engaged in physical activity, the larger the brain volume. Greater brain volume is a sign of a lower degree of brain cell death as well as general brain health. Cognitive tests were also administered and these also indicated improved cognitive performance in healthy individuals and lower losses in cognitive performance for those who already had begun to decline cognitively.

Physical activity improves blood flow to the brain, changes neurotransmitters, and improves cardiac function. It also lessens the risk of obesity, improves insulin resistance and lowers the risk of diabetes, and lowers blood pressure, All of these things are risk factors for Alzheimer’s disease.

Clearly the Healthymemory Blog endorses physical activity in addition to the mental activities advocated in this blog. These include mnemonic techniques and transactive memory. Transactive memory entails cognitive growth via technology and our fellow human beings.

1Regular Walking May Slow Decline of Alzheimer;s, http://consumer;

© Douglas Griffith and, 2011. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Douglas Griffith and with appropriate and specific direction to the original content.

A Review of Brain Exercises and Training Induced Learning

December 1, 2010

This post in based on a review article in Psychology and Aging.1 This article notes that there are volumes of evidence that even as we age, training in specific tasks generally results in improved performance on those tasks. The problem is that most of this research indicates that improvements are specific to the task and do not generalize to measurable benefits in daily life. This does not mean that this training is worthless. It can still provide beneficial exercise to the brain. Consider doing push-ups for physical exercise. Undoubtedly, doing push ups regularly is beneficial to your health. Nevertheless, it would be difficult to find that doing them provided measurable benefits in daily life outside your exercise regime.

So providing measurable benefits in daily life, say an overall increase in the rate of learning, is a difficult goal to achieve. Yet certain programs have provided evidence to this effect, and the authors of this article sought to capture the features of these programs that lead to generalizable results. They identified the following characteristics: Task difficulty, motivation and arousal, feedback, and variability.

With respect to the characteristic of task difficulty it is important to begin with an easy level of difficulty and then gradually advance through levels of increasing task difficulty. Obviously, if the task is too difficult to begin with, people become discouraged and learning suffers. However, if people are able to accomplish the task fairly easily, then can gradually increase their skill while advancing to increasing levels of difficulty.

Perhaps it is obvious, but if people are motivated to learn, they are more likely to succeed. Arousal goes hand in hand with motivation. Aroused learners, within limits, learn faster. So tasks that are enjoyable and rewarding increase arousal levels, and so forth, and so forth.

Feedback is important so that people know that they are performing the task correctly. This also relates back to motivation, arousal, and task difficulty. When task difficulty can be accommodated, the feedback is positive, which is arousing and increases motivation. Now task difficulty can be too easy, in which case the feedback is trivial, not rewarding and does not lead to arousal and increased motivation. So task difficulty is what is termed a “Goldilocks” characteristic—not too easy and not too difficult, but just right.

Variability is the final key characteristic. The training program should exercise a wide variety of skills. It is this variability that increases the likelihood that the benefits will transfer to everyday life and learning.

Unfortunately, too many Baby Boomers and looking for the magic exercise, the magic program, or the magic vitamin or dietary supplementary to ward off the effects of aging. There is no magic exercise or pill. What is required is a range of activities and exercises to ward off the effects of aging. The Healthymemory Blog recommends such activities. Its blog posts provide a variety of mnemonic techniques (click on the category mnemonic techniques) that increase the efficiency of memory and provide mental exercises that make requirements on creativity, recoding, and both hemispheres of the brain. The Healthymemory Blog provides information on human cognition, that provide both exercise and insight into cognitive processes. Transactive memory provides for cognitive growth via the technology, the internet, books, as well as for interactions with your fellow human beings.

1Green, C.S., & Bavilier, D. (2010). Exercising Your Brain: A Review of Human Brain Plasticity and Training-Induced Learning. Psychology and Aging, 23, 692-701. 

© Douglas Griffith and, 2010. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Douglas Griffith and with appropriate and specific direction to the original content.