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Some forms of exercise may be much more effective than others at bulking up the brain, according to a remarkable new study in rats. For the first time, scientists compared head-to-head the neurological impacts of different types of exercise: running, weight training and high-intensity interval training. The surprising results suggest that going hard may not be the best option for long-term brain health.

exercise changes the structure and function of the brain. Studies in animals and people have shown that physical activity generally increases brain volume and can reduce the number and size of age-related holes in the brain’s white and gray matter.

Exercise also, and perhaps most resonantly, augments adult neurogenesis, which is the creation of new brain cells in an already mature brain. In studies with animals, exercise, in the form of running wheels or treadmills, has been found to double or even triple the number of new neurons that appear afterward in the animals’ hippocampus, a key area of the brain for learning and memory, compared to the brains of animals that remain sedentary. Scientists believe that exercise has similar impacts on the human hippocampus.

Too Much High-Intensity Exercise May Be Bad for Your Health

A new study hints that excessive HIIT may harm your mitochondria, the energy generators found in every cell of your body.

If high-intensity exercise is good for us, is more necessarily better?

A 2014 experiment with mice first raised that worrying idea, finding that the more the animals exercised, the worse their long-term memories became.

Study after study in animals has shown that exercise, especially aerobic activities like running, can double or triple the number of new cells in the hippocampus, compared with the number in animals that do not exercise, and that these new cells translate into a significantly heightened ability to learn new skills. Animals that run, in essence, become brighter than those that do not. But most of these studies of exercise and neurogenesis have examined the effects on learning and short-term memory.

But for now, he believes that the available evidence suggests that, unless you are a mouse, working out is going to be “quite beneficial” for your brain.

Exercise May Aid Brain's 'Rewiring'

Moderate levels of exercise may increase the brain’s flexibility and improve learning

The visual cortex, the part of the brain that processes visual information, loses the ability to “rewire” itself with age,

Exercise broadly improves our memories and thinking skills, according to a wealth of science. The evidence supporting similar benefits from so-called brain training has been much iffier, however, with most people performing better only on the specific types of games or tasks practiced in the program.

Most of us are blissfully unaware of the complexity of our brain’s memory systems. Memories come in many different types, including detailed recollections of faces and objects and how they differ from similar faces and objects, as well as separate memories about where and when we last saw those things. These remembrances are created and stored throughout the hippocampus, our brain’s primary memory center.

In general, the young people who had exercised, whether they also brain trained or not, were then more physically fit than those in the control group. They also, for the most part, performed better on memory tests. And those improvements spanned different types of memory, including the ability to rapidly differentiate among pictures of objects that looked similar, a skill not practiced in the brain-training group.

Our society is divided into castes based upon a supposed division between theoretical knowledge and practical skill. The college professor holds forth on television, as the plumber fumes about detached ivory tower intellectuals.

. There is a natural temptation to view these activities as requiring distinct capacities.

If these are distinct cognitive capacities, then knowing how to do something is not knowledge of a fact — that is, there is a distinction between practical and theoretical knowledge.

people usually experience the sensation of happiness whenever they have both health and freedom. It’s a simple formula: Happiness = Health + Freedom

I’m talking about the everyday freedom of being able to do what you want when you want to do it, at work and elsewhere. For happiness, timing is as important as the thing you’re doing

Matching your mood to your activity is a baseline requirement for happiness

For MacIntyre, “rationality” comprises all the intellectual resources, both formal and substantive, that we use to judge truth and falsity in propositions, and to determine choice-worthiness in courses of action

Rationality in this sense is not universal; it differs from community to community and from person to person, and may both develop and regress over the course of a person’s life or a community’s history.

So rationality itself, whether theoretical or practical, is a concept with a history: indeed, since there are also a diversity of traditions of enquiry, with histories, there are, so it will turn out, rationalities rather than rationality, just as it will also turn out that there are justices rather than justice

Yes, Many of Us Are Stress-Eating and Gaining Weight in the Pandemic

A global study confirms that during the pandemic, many of us ate more junk food, exercised less, were more anxious and got less sleep.

Not long ago, Stephen Loy had a lot of healthy habits. He went to exercise classes three or four times a week, cooked nutritious dinners for his family, and snacked on healthy foods like hummus and bell peppers.

There are plenty of ways to improve your memory. Sleep, for instance, helps consolidate information, leading to better recall. And, as Stat reports, a new study says exercise may also keep your steel trap more tightly closed.

Just as vigorous exercise tires our bodies, intellectual exertion should drain the brain. What the latest science reveals, however, is that the popular notion of mental exhaustion is too simplistic. The brain continuously slurps up huge amounts of energy for an organ of its size, regardless of whether we are tackling integral calculus or clicking through the week's top 10 LOLcats. Although firing neurons summon extra blood, oxygen and glucose, any local increases in energy consumption are tiny compared with the brain's gluttonous baseline intake. So, in most cases, short periods of additional mental effort require a little more brainpower than usual, but not much more.

something must explain the feeling of mental exhaustion, even if its physiology differs from physical fatigue. Simply believing that our brains have expended a lot of effort might be enough to make us lethargic.

a typical adult human brain runs on around 12 watts—a fifth of the power required by a standard 60 watt lightbulb. Compared with most other organs, the brain is greedy; pitted against man-made electronics, it is astoundingly efficient. IBM's Watson, the supercomputer that defeated Jeopardy! champions, depends on ninety IBM Power 750 servers, each of which requires around one thousand watts.

Neurologically, how does our brain adapt itself to new technologies? Nicholas Carr: A couple of types of adaptations take place in your brain. One is a strengthening of the synaptical connections between the neurons involved in using that instrument, in using that tool. And basically these are chemical – neural chemical changes. So you know, cells in our brain communicate by transmitting electrical signals between them and those electrical signals are actually activated by the exchange of chemicals, neurotransmitters in our synapses. And so when you begin to use a tool, for instance, you have much stronger electrochemical signals being processed in those – through those synaptical connections. And then the second, and even more interesting adaptation is in actual physical changes,anatomical changes. Your neurons, you may grow new neurons that are then recruited into these circuits or your existing neurons may grow new synaptical terminals. And again, that also serves to strengthen the activity in those, in those particular pathways that are being used – new pathways. On the other hand, you know, the brain likes to be efficient and so even as its strengthening the pathways you’re exercising, it’s pulling – it’s weakening the connections in other ways between the cells that supported old ways of thinking or working or behaving, or whatever that you’re not exercising so much.

And it was only in around the year 800 or 900 that we saw the introduction of word spaces. And suddenly reading became, in a sense, easier and suddenly you had to arrival of silent reading, which changed the act of reading from just transcription of speech to something that every individual did on their own. And suddenly you had this whole deal of the silent solitary reader who was improving their mind, expanding their horizons, and so forth. And when Guttenberg invented the printing press around 1450, what that served to do was take this new very attentive, very deep form of reading, which had been limited to just, you know, monasteries and universities, and by making books much cheaper and much more available, spread that way of reading out to a much larger mass of audience. And so we saw, for the last 500 years or so, one of the central facts of culture was deep solitary reading.

What the book does as a technology is shield us from distraction. The only thinggoing on is the, you know, the progression of words and sentences across page after page and so suddenly we see this immersive kind of very attentive thinking, whether you are paying attention to a story or to an argument, or whatever. And what we know about the brain is the brain adapts to these types of tools.

It's not that it's impossible for governments to hold down obesity; France, which had rapidly rising childhood obesity early this century, instituted an aggressive set of public-health interventions including school-based food and exercise shifts, nurse assessments of overweight kids, visits to families where overweight kids were identified, and so forth. Their childhood obesity rates stabilised at a fraction of America's.

The problem isn't that it's not possible; rather, it's that America is incapable of doing it.

America's national governing ideology is based almost entirely on the assertion of negative rights, with a few exceptions for positive rights and public goods such as universal elementary education, national defence and highways. But it's become increasingly clear over the past decade that the country simply doesn't have the political vocabulary that would allow it to institute effective national programmes to improve eating and exercise habits or culture. A country that can't think of a vision of public life beyond freedom of individual choice, including the individual choice to watch TV and eat a Big Mac, is not going to be able to craft public policies that encourage people to exercise and eat right. We're the fattest country on earth because that's what our political philosophy leads to. We ought to incorporate that into the way we see ourselves; it's certainly the way other countries see us.

Clear Lake found that Rogers could recruit an abnormally high number of muscle fibers. But was this ability because of a freak genetic mutation? Another possibility, which Rogers thinks is more likely, is the way he processes pain when he strains those muscles.

What if, instead of superpowered muscles, Rogers has a normal—though extremely well exercised—body, and his abilities arise because he can withstand more pain than most mere mortals?

Rogers reasons that, unlike in the dentist's office—where he has no control over the pain that is inflicted on him—he has direct executive control over pain that he inflicts on himself. “I know it's coming, I have an idea of what to expect and I can decide to ignore it,” he says. Confronted with severe pain, most people fear that they will damage their body permanently if they persist, so they stop well before they are in real danger, Rogers explains.

Satya Doyle Byock, a 39-year-old therapist, noticed a shift in tone over the past few years in the young people who streamed into her office: frenetic, frazzled clients in their late teens, 20s and 30s. They were unnerved and unmoored, constantly feeling like something was wrong with them.

“Crippling anxiety, depression, anguish, and disorientation are effectively the norm,”

her new book, “Quarterlife: The Search for Self in Early Adulthood.” The book uses anecdotes from Ms. Byock’s practice to outline obstacles faced by today’s young adults — roughly between the ages of 16 and 36 — and how to deal with them.

when it comes to diet and heart disease, doctors — and patients — have been going on hunches.

Dr. Estruch said he and his colleagues were so buoyed by the success of their study that they were planning another one. They intend to randomly assign people to consume the Mediterranean diet or to exercise while following a similar diet that is lower in calories. The hope is that adding weight loss and exercise will prevent even more heart disease.

for now, chaos reigns. The public is bombarded with diet advice, often contradictory and often lacking a rigorous scientific grounding, medical experts said.

the act of formulating questions enables us “to organize our thinking around what we don’t know.” This makes questioning a good skill to hone in dynamic times.

Asking questions can help spark the innovative ideas that many companies hunger for these days

By the time we’re in the workplace, many of us have gotten out of the habit of asking fundamental questions about what’s going on around us. And some people worry that asking questions at work reveals ignorance or may be seen as slowing things down.

democratization of information-gathering—when accompanied by smart institutional and technological arrangements—has been tremendously useful, giving us Wikipedia and Twitter. But it has also spawned thousands of sites that undermine scientific consensus, overturn well-established facts, and promote conspiracy theories

Meanwhile, the move toward social search may further insulate regular visitors to such sites; discovering even more links found by their equally paranoid friends will hardly enlighten them.

Initially, the Internet helped them find and recruit like-minded individuals and promote events and petitions favorable to their causes. However, as so much of our public life has shifted online, they have branched out into manipulating search engines, editing Wikipedia entries, harassing scientists who oppose whatever pet theory they happen to believe in, and amassing digitized scraps of "evidence" that they proudly present to potential recruits.

The number of young men and women majoring in English has dropped dramatically; the same is true of philosophy, foreign languages, art history, and kindred fields, including history. As someone who has taught in four university English departments over the last 40 years, I am dismayed by this shift, as are my colleagues here and there across the land. And because it is probably irreversible, it is important to attempt to sort out the reasons—the many reasons—for what has happened.

English: from 7.6 percent of the majors to 3.9 percent

In one generation, then, the numbers of those majoring in the humanities dropped from a total of 30 percent to a total of less than 16 percent; during that same generation, business majors climbed from 14 percent to 22 percent.