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Exercise is Infectious

Exercise is Infectious

Quick Hits
Daily brief research updates from the cognitive sciences

running crowd

This is an older study (2017) I came across and found fascinating. As many of you regular readers will know I have reported many times on the benefits of exercise. But this study was fascinating in that it looked at the contagion effect of exercise i.e. do people affect each other with the exercise bug?

To answer that question the researchers analyses data from a global network of 1.1 million runners over a period of five years and in addition 3.4 million social network ties. That’s a lot of data! What did they find?

Well, yes there is social contagion, runners do infect each other but the specifics are quite interesting. For example, it was found that both men and women influence men (men more than women) but that men do not influence women. Another interesting influence is that of being faster or slower runner. It was found that those who were slightly slower of faster influenced other most.

Read the paper for more interesting insights but of note is that exercise (in this case running) is infectious but how infectious depends on certain other factors such as closeness, gender, and how good you and your friends are – or not.

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

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Reference

Aral, S., and Nicolaides, C. (2017).
Exercise contagion in a global social network.
Nat. Commun. 8.
doi:10.1038/ncomms14753.

More Quick Hits

Exercise is Infectious

Exercise is Infectious

Quick HitsDaily brief research updates from the cognitive sciences his is an older study (2017) I came across and found fascinating. As many of you regular readers will know I have reported many times on the benefits of exercise. But this study was...

Breastfeeding Improves Mother’s Cognitive Abilities — Years Later

Breastfeeding Improves Mother’s Cognitive Abilities — Years Later

Quick Hits
Daily brief research updates from the cognitive sciences

mother brain baby

So are you saying that breast feeding is not only good for the infant but also the mother?!
Yes, we’ve know for a long, long time that breastfeeding is very good for the infant. Over the years and with more research new ways in which this are beneficial have been regularly found.

And what did this research show?
Molly Fox et al. at the University of California collected data from two population cohorts and this included 115 women of which 64 were classed as depressed and 41 as not.

More women who breastfed were non-depressed than depressed suggesting a link between breastfeeding and depression.

Oh wow and what about cognitive abilities?
Well, this is where it becomes interesting. Four cognitive tests were used to measure learning, delayed recall, executive functioning and processing. And these were all better, on average in those who had breastfed. But what is more interesting is that there is a positive correlation between how long they breastfed and these abilities!

So the more they breastfed the better their abilities?
Precisely!

And how old were these women?
They were all over 50! This suggests that not only is breastfeeding beneficial to the mother but that this lasts over a lifetime — or rather gives benefits over a lifetime.

And how is this beneficial?
Well, this is open. There is plenty of research into women and how the various lifecycle events impact their health, such as exposure to fluctuating levels of estrogen. There are mechanisms we know in promoting the health of infant such as exchange of immune cells and increased microbiota diversity.

It could be that there are other reasons such as the ability to spend a long time breastfeeding through higher financial security or the beneficial effects of the closeness to the child.

But for now breastfeeding is highly recommended
Yes, and that is why health authorities do actively promote breastfeeding. We now have another reason to support this

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

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Reference

Molly Fox, Prabha Siddarth, Hanadi Ajam Oughli, Sarah A Nguyen, Michaela M Milillo, Yesenia Aguilar, Linda Ercoli, Helen Lavretsky. 
Women who breastfeed exhibit cognitive benefits after age 50. 
Evolution, Medicine, and Public Health, 2021
DOI: 10.1093/emph/eoab027

More Quick Hits

Exercise is Infectious

Exercise is Infectious

Quick HitsDaily brief research updates from the cognitive sciences his is an older study (2017) I came across and found fascinating. As many of you regular readers will know I have reported many times on the benefits of exercise. But this study was...

Mothers Can Pass on Stress to Future Generations

Mothers Can Pass on Stress to Future Generations

Quick Hits
Daily brief research updates from the cognitive sciences

baby mother brain stress

I presume you’re not just talking about stressed mothers stressing out their kids and/or grandchildren?
Not precisely. I’m talking about passing on stress activation patterns in DNA genetically.

Oh, that doesn’t sound good!
No, it isn’t good. We have known for quite a while that so-called epigenetic changes seem to be passed on to offspring.

What’s epigenetic?
All genes need to be activated and can be activated in different ways. Epigenetic markers are not a change in genes but how the existing genes are activated or not.

Ok, and this can be passed on?
Yes, the researchers from the University of Iowa, found out the precise mechanism. Clever things they are. But it is complicated. Basically instead of cleaning the hard drive, so to speak, and resetting genes, a protein released stops this “cleaning of the hard drive” and instead of the genes being reset the stress is passed on. Specifically in this case being present in unfertilised eggs.

And what changes?
In this case, Quote: “One of these newly silenced genes encodes the insulin receptor, which is central to metabolic changes with diabetes in humans, and which, when silenced, alters an animal’s physiology, metabolism, and stress resilience.”

Is this big news
Well, as I said, we already knew some of these things can be passed on. For example previous research has shown parents who have been though periods of starvation add an “eating” gene activation and this is passed on to children who are more likely to become obese. Read about that here.

Oh wow? So we should look after ourselves because the damage we do to yourselves can be passed on to our children.
Precisely!

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

twitter / LinkedIn

Reference

Srijit Das, Sehee Min, Veena Prahlad.
Gene bookmarking by the heat shock transcription factor programs the insulin-like signaling pathway.
Molecular Cell, 2021
DOI: 10.1016/j.molcel.2021.09.022

More Quick Hits

Exercise is Infectious

Exercise is Infectious

Quick HitsDaily brief research updates from the cognitive sciences his is an older study (2017) I came across and found fascinating. As many of you regular readers will know I have reported many times on the benefits of exercise. But this study was...

Learning Before Age Five Can be Seen in the Brain Forty Years Later

Learning Before Age Five Can be Seen in the Brain Forty Years Later

Quick Hits
Daily brief research updates from the cognitive sciences

learning education brain

Education before age five leaves structural changes to the brain, identifiable forty years later — impressive! This is the beauty of long-term longitudinal studies (the negative side is you have to wait decades to get the results).

Abecedarian Project was an early education randomised controlled trial that has followed development since 1971 in North Carolina in the USA. In this project there was a control group (of 18) and an educational group (of 29) in groups of high-risk infants i.e. from socially under-privileged children. Both groups received extra health care, nutrition, and family support services. The education group received in addition, five years of high quality educational support (from 6 weeks old!), five days a week, 50 weeks a year.

Therefore this gives us a good control with similar situations and similar levels of support and the biggest difference being the education given in the first five years of life.

In the meantime neuroscientific advances have now enabled deep insight into what has actually happened in these individual’s brains, unthinkable when this started in the 1970’s, and the results are dramatic.

Specifically, the brain as a whole was on average larger with greater cortical thickness — and five regions associated with language ability, cognitive control and memory also increased size.

That’s pretty impressive.

“This has exciting implications for the basic science of brain development, as well as for theories of social stratification and social policy,” — Martha Farah

“We have demonstrated that in vulnerable children who received stimulating and emotionally supportive learning experiences, statistically significant changes in brain structure appear in middle age.” — Craig Ramey

This is, of course, also in line with the positive behavioural differences that have been recorded over the years.

Of interest is that these differences in brain structures were larger in men than women but they did not seem to differ on behavioural measures. The reasons for that are unclear. But what we can say is that investing in early education, very early, particularly in under-privileged areas, is a good thing for society because of its life-long benefits

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

twitter / LinkedIn

Reference

Martha J. Farah, Saul Sternberg, Thomas A. Nichols, Jeffrey T. Duda, Terry Lohrenz, Yi Luo, Libbie Sonnier, Sharon L. Ramey, Read Montague, Craig T. Ramey. 
Randomized Manipulation of Early Cognitive Experience Impacts Adult Brain Structure.
 Journal of Cognitive Neuroscience, 2021; 33 (6): 1197
DOI: 10.1162/jocn_a_01709

More Quick Hits

Exercise is Infectious

Exercise is Infectious

Quick HitsDaily brief research updates from the cognitive sciences his is an older study (2017) I came across and found fascinating. As many of you regular readers will know I have reported many times on the benefits of exercise. But this study was...

Exercise in Childhood Predicts Healthy Brains (into Adulthood)

Exercise in Childhood Predicts Healthy Brains (into Adulthood)

Quick Hits
Daily brief research updates from the cognitive sciences

brain development children

Ok, we all know by now that exercise is good for you. Many of you may also be more than aware that exercise is a potent stimulator for the brain encouraging brain growth and effective functioning. Read my article on brain health here.

Two pieces of research have recently been published which show, however, that not just exercise is good for you, but the timing is essential. Specifically, that exercise in pre-teens predicted the fitness of their brains later and also, by another piece of research, that exercise in childhood predicted healthy adult brains!

So, first off, the study from Boston Children’s Hospital shows that physical activity helps to organise developing brains. This study analysed brain imaging data from almost 6’000 9- to 10-year-olds and found that physical activity was associated with brains that were:

  • More efficiently organised
  • More robust
  • Had more flexible networks

Basically giving kids fitter brains all round and better able to adapt to whatever challenges and cognitive functions come at them. Of note is that it didn’t matter what kind of activity — any physical activity is good.

Skylar Brooks, Boston Children’s Hospital)

This then leads us to separate recent study, nicely linking to the above, which looked at childhood pre-teen exercise and cognitive function in later life mapped to MRI data (214 participants aged between 26 and 69). This was conducted by a research group with Professor MATSUDA Tetsuya of Tamagawa University’s Brain Science Institute and Assistant Professor ISHIHARA Toru from Kobe University’s Graduate School of Human Development and Environment.

The results showed that

  • People who are physically active during childhood (up to 12 years of age) have higher cognitive functions in later life.
  • The positive association between childhood exercise and cognitive function could be seen in the modular segregation of brain networks, strengthened inter-hemispheric connectivity, greater cortical thickness, lower levels of dendritic arborisation and decreased density.

During early childhood the brain is at its most plastic and it seems that exercise optimises the networks and structures that are later used for multiple cognitive functions.

That’s good news, or maybe bad news. Bad news because they couldn’t find an association with cognitive functions and post-childhood physical activity. This is a surprise because there is a lot of research on the positive benefits of exercise — but it could be that these changes are only mild compared to the impacts on a developing child brain which set it up for life.

Got kids? Well, get them exercising!

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

twitter / LinkedIn

Reference

More Quick Hits

Exercise is Infectious

Exercise is Infectious

Quick HitsDaily brief research updates from the cognitive sciences his is an older study (2017) I came across and found fascinating. As many of you regular readers will know I have reported many times on the benefits of exercise. But this study was...

The Surprising Truth of Why Powerful People can be Toxic

The Surprising Truth of Why Powerful People can be Toxic

Quick Hits
Daily brief research updates from the cognitive sciences

neuroleadership

We’ve all heard the stories of toxic bosses, and powerful people who happily destroy other people’s lives, and show no compassion to those less fortunate than themselves.

There is a rich (pun intended) literature on the so-called dark triad traits (Machiavellianism, narcissism, psychopathy)of leaders. These seem particularly prevalent in senior leaders, anywhere from 5%-50% exhibiting these traits depending on whose research you read.

There are many reasons for this — I reported in a previous Quick Hit on how narcissists feel like victims — but this recent research University of California, San Diego, takes ordinary people and manipulates their power to see what happens in their judgements and decision making.

The results are not pretty. So what happened?

The researchers conducted three studies to explore the power dynamic in three different settings. People were assigned to the high power role randomly — this is important because this shows that it is the power that is changing an individual’s interaction with those lower on power, and not personality or personal life situations.

What they found is that when given more power, for example being put in a supervisor role, they become less forgiving. One example was judging an assistant who couldn’t complete one task because of obviously conflicting deadlines. Those with higher power were less understanding, harsher in their judgments, and more willing to mete out punishment!

“Compared to low-power people, high-power people are less likely to be aware of others’ constraints. As a result they assign more blame when people make mistakes or have shortcomings. Thus, they see the current hierarchy as more justified.” -Yidan Yin

The results were consistent across the three experiments each conducted with 300–400 people, which is an impressive size for this type of study.

The results are profound and worrying.

The researchers note that those with a “High-Choice Mindset” assign their own ability to make choice to others who cannot do so and so assign intentionality to decisions and actions over which the lower power individuals have no choice. These are judged more harshly and, sadly, many are more willing to punish these. The big takeaway, and I stress it is big takeaway, is that this seems to be influenced not by personality or political leaning (though I am sure these will moderate or magnify these effects) but simply by life situation.

This has massive implications for public policy and political parties. In fact it explains some political standpoints without any further analysis!

For those in business, this also has many implications and knock-on effects. It explains why some leaders become toxic as they move through the ranks and why many leaders seem uncaring — it is because they are. Or more importantly, have become so through their power and not necessarily their personality.

Power corrupts, as the saying goes, and this research shows that, alas, indeed it does, on average.

This also shows why there is a need for strong, powerful, and understanding leaders.

So, is there any good news to finish off this article. Well, yes. As usual they report an average, closer inspection shows that not everyone is susceptible to this effect. Some people can have power and understanding. Good to know.

What’s more, when we look into the research into leadership behaviours that get the best out of people and are therefore most beneficial for companies they are behaviours such as care, trust, building a learning mindset, and being supportive.

So, though power may make people, on average, less forgiving, harsher, and more willing to punish, the most effective leadership behaviours, research continually shows, are the opposite.

Phew!

Andy Habermacher

Andy Habermacher

Andy is author of leading brains Review, Neuroleadership, and multiple other books. He has been intensively involved in writing and research into neuroleadership and is considered one of Europe’s leading experts. He is also a well-known public speaker speaking on the brain and human behaviour.

Andy is also a masters athlete (middle distance running) and competes regularly at international competitions (and holds a few national records in his age category).

twitter / LinkedIn

Reference

Yin Y, Savani K, Smith PK.
Power Increases Perceptions of Others’ Choices, Leading People to Blame Others More. 
Social Psychological and Personality Science. 2022;13(1):170-177.
doi:
10.1177/19485506211016140

More Quick Hits

Exercise is Infectious

Exercise is Infectious

Quick HitsDaily brief research updates from the cognitive sciences his is an older study (2017) I came across and found fascinating. As many of you regular readers will know I have reported many times on the benefits of exercise. But this study was...