healthy – Page 4

Sex vs Exercise

Somewhere near the top of every single one of the the roughly forty-kajillion internet listicles dedicated to the “surprising,” “hidden,” and “unexpected”health benefits of sex is the not-all-that-surprising-sounding factoid that bumping fuzzies basically doubles as exercise. In reality, however, there has been very little research done to support this claim.

The few studies that have investigated the physicality of sex have typically looked at things like heart rate and blood pressure – important but arguably basic physiological measurements. They’ve also been conducted primarily in laboratory settings – which, sure, probably falls into some specific category of kink, but for most people is probably a less-than-ideal environment for sexy time. It’s not difficult to imagine, for example, how the wires from an echocardiogram, or the bulk of an oxygen-monitoring facemask, might interfere with one’s (doubtless considerable) sexual talents, thereby confounding any attempt at accurate physiological measurement.

The point being that these methodological limitations highlight a gap in the existing body of scientific knowledge raises an important question about how physically strenuous sex really is. How much energy does a young, healthy couple actually expend getting physical between the sheets? Are we talking a pastrami sandwich’s worth of calories, or a handful of kale’s? And to what extent does sex really count as exercise?

…Researchers led by Université du Québec à Montréal kinanthropologist Antony Karelis… The goal: measure the free-living energy expenditure (in calories) during sexual activity, in the absence of drugs, alcohol, or ED medications. (Study participants were also asked to forego any and all paraphilic sexual activities – i.e. nothing deemed too freaky by… well… society, we guess.) The final figures are as follows:

Mean energy expenditure during sexual activity (men)

101 kCal (the same as 101 dietary Calories), or 4.2 kCal/min

Mean energy expenditure during sexual activity (women)

69.1 kCal, or 3.1 kCal/min

So the overall average comes out to roughly 85 kCal (3.6 kCal/min) – about the same number of dietary calories in your standard chicken egg…

Robbie Gonzalez

Source

http://io9.gizmodo.com/seriously-though-does-sex-count-as-exercise-1452095982

What kind of habit keeps you exercising?

It’s not always easy to convince yourself to exercise after a long day of work. (Ok, it’s never easy.) But people who consistently manage to do it may be using a simple trick—whether they realize it or not—according to a new study published in the journal Health Psychology.

The most consistent exercisers, researchers found, were those who made exercise into a specific type of habit—one triggered by a cue, like hearing your morning alarm and going to the gym without even thinking about it, or getting stressed and immediately deciding to exercise.

It’s not something you have to deliberate about; you don’t have to consider the pros and cons of going to the gym after work,

explains L. Alison Phillips, PhD, assistant professor of psychology at Iowa State University and one of the study’s authors. Instead, it’s an automatic decision instigated by your own internal or environmental cue.
The researchers wanted to see whether this type of habit, known as an instigation habit, was better than another type of habit at predicting who stuck with a month of exercise. At the beginning and end of the monthlong study, they asked 123 university students and faculty questions that assessed how often they exercised and how strong their exercise habits were—whether they did it without thinking, for example. From these questions, they gleaned whether a person has a strong instigation habit—one where a cue triggers the instantaneous decision to exercise—and whether a person has a strong execution habit—that is, knowing exactly what kind of exercise they’ll do once you get to the gym, or being able to go through the motions of an exercise routine while being mentally checked out.

The only factor that predicted how often a person exercised over the long-term, they found, was the strength of their instigation habit. It got stronger with time, too.

When people started exercising more frequently over the month and became more active, I saw that their instigation habit strength increased with that frequency, but execution habit didn’t really change in relation to frequency at all…

Mandy Oaklander | July 9, 2015 | Time

https://pragmasynesi.wordpress.com/2015/10/30/what-kind-of-habit-keeps-you-exercising/

Stress, evolution and cancer

Interesting theory — stress speeds up evolution. Evolution of all possible cells.

Full article: Does Stress Speed Up Evolution?

Implication for cancer: the group of scientists from Princeton University admitted that

the current aggressive approach to cancer treatment has largely failed.

According to a molecular biologist Susan M. Rosenberg and colleagues like Robert H. Austin, a physicist at Princeton University, organisms have evolved mechanisms that enable them to drive their own evolution in times of stress. Environmental pressure can boost mutation rates rapidly, even in cells that are not dividing, enabling them to adapt more quickly to new conditions.

Organisms under stress have a higher mutation rate…

believe researchers.

…Austin says his experiments suggest that

putting too much stress on cancer cells by hitting them with high doses of cancer drugs could accelerate their evolution to develop drug resistance

Instead, he is culturing cancer cells on his death galaxy to find the right low-dosing and timing of cancer drugs that keep the cancer cells from spreading without killing them—hopefully delaying the evolution of resistance as long as possible.

At least in an ovarian cancer model in mice, the approach seems to work. In 2009, Robert Gatenby, a radiologist at the Moffitt Cancer Center in Tampa, Florida, and his colleagues reported that interrupting, or down-adjusting, therapy as long as the tumor volume didn’t increase prolonged survival in these mice compared with the standard aggressive regimen.

If you give them standard high-dose therapy, the tumor can almost completely go away and then come back very rapidly and be resistant,

Gatenby says.

If you use an adaptive approach, we can consistently get control of the tumor.

Gatenby is now testing the approach in a 40-patient open clinical trial in patients with late-stage prostate cancer….

https://pragmasynesi.wordpress.com/2016/04/23/stress-evolution-and-cancer/

http://nautil.us/issue/34/adaptation/does-stress-speed-up-evolution

How Neuroscientists Explain the Mind-Clearing Magic of Running

It is something of a cliché among runners, how the activity never fails to clear your head. Does some creative block have you feeling stuck? Go for a run. Are you deliberating between one of two potentially life-altering decisions? Go for a run. Are you feeling mildly mad, sad, or even just vaguely meh? Go for a run, go for a run, go for a run.

The author Joyce Carol Oates once wrote in a column for the New York Times that

in running the mind flees with the body … in rhythm with our feet and the swinging of our arms.

Filmmaker Casey Neistat told Runner’s World last fall that running is sometimes the only thing that gives him clarity of mind.

“Every major decision I’ve made in the last eight years has been prefaced by a run,”

he told the magazine. But I maybe like the way a runner named Monte Davis phrased it best, as quoted in the 1976 book The Joy of Running:

“It’s hard to run and feel sorry for yourself at the same time. Also, there are those hours of clear-headedness that follow a long run.”

A good run can sometimes make you feel like a brand-new person. And, in a way, that feeling may be literally true. About three decades of research in neuroscience have identified a robust link between aerobic exercise and subsequent cognitive clarity, and to many in this field the most exciting recent finding in this area is that of neurogenesis. Not so many years ago, the brightest minds in neuroscience thought that our brains got a set amount of neurons, and that by adulthood, no new neurons would be birthed. But this turned out not to be true. Studies in animal models have shown that new neurons are produced in the brain throughout the lifespan, and, so far, only one activity is known to trigger the birth of those new neurons: vigorous aerobic exercise, said Karen Postal, president of the American Academy of Clinical Neuropsychology. “That’s it,” she said. “That’s the only trigger that we know about.”

The other fascinating thing here is where these new cells pop up: in the hippocampus, a region of the brain associated with learning and memory. So this could help explain, at least partially, why so many studies have identified a link between aerobic exercise and improvement in memory.

If you are exercising so that you sweat — about 30 to 40 minutes — new brain cells are being born,

added Postal, who herself is a runner. “And it just happens to be in that memory area.”
Other post-run changes have been recorded in the brain’s frontal lobe, with increased activity seen in this region after people adopt a long-term habit of physical activity. This area of the brain — sometimes called the frontal executive network system — is located, obviously enough, at the very front: It’s right behind your forehead. After about 30 to 40 minutes of a vigorous aerobic workout – enough to make you sweat – studies have recorded increased blood flow to this region, which, incidentally, is associated with many of the attributes we associate with “clear thinking”: planning ahead, focus and concentration, goal-setting, time management.

But it’s this area that’s also been linked to emotion regulation, which may help explain the results of one recent study conducted by Harvard psychology professor Emily E. Bernstein. Like Postal, Bernstein is also a runner, and was curious about a pattern she saw in her own mind after a run.

I notice in myself that I just feel better when I’m active.

She started to become really interested in the intervention studies that have popped up in recent years that suggest if you can get people who are having trouble with mood or anxiety to exercise, it helps. “But why?” she wanted to know. “What is exercise actually doing?”

To find out, she did a version of a classic experiment among researchers who study emotion: She and her colleague — Richard J. McNally, also of Harvard — played a reliable tearjerker of a clip: the final scene of the 1979 film The Champ.

Before watching the film clip, some of the 80 participants were made to jog for 30 minutes; others just stretched for the same amount of time. Afterward, all of them filled out surveys to indicate how bummed out the film had made them. Bernstein kept them busy for about 15 minutes after that, and surveyed them again about how they were feeling. Those who’d done the 30-minute run were more likely to have recovered from the emotional gut-punch than those who’d just stretched — and, her results showed, the people who’d initially felt worse seemed to especially benefit from the run. Bernstein is currently doing a few follow-up research projects to determine exactly why this works the way it does.

But there’s another big mental benefit to gain from running, one that scientists haven’t quiet yet managed to pin down to poke at and study: the wonderful way your mind drifts here and there as the miles go by. Mindfulness, or being here now, is a wonderful thing, and there is a seemingly ever-growing stack of scientific evidence showing the good it can bring to your life. And yet mindlessness — daydreaming, or getting lost in your own weird thoughts — is important, too. Consider, for example, this argument, taken from a 2013 article by a trio of psychologists in the journal Frontiers in Psychology:

“We mind wander, by choice or by accident, because it produces tangible reward when measured against goals and aspirations that are personally meaningful. Having to reread a line of text three times because our attention has drifted away matters very little if that attention shift has allowed us to access a key insight, a precious memory or make sense of a troubling event. Pausing to reflect in the middle of telling a story is inconsequential if that pause allows us to retrieve a distant memory that makes the story more evocative and compelling. Losing a couple of minutes because we drove past our off ramp is a minor inconvenience if the attention lapse allowed us to finally understand why the boss was so upset by something we said in last week’s meeting. Arriving home from the store without the eggs that necessitated the trip is a mere annoyance when weighed against coming to a decision to ask for a raise, leave a job, or go back to school.

Just because the benefits of losing yourself in your own thoughts are not easily measured doesn’t mean they’re not of value, and there are few ways I know of that induce this state of mind more reliably than a long run. A handful of recent studies have tried to answer what every runner, whether pro or hobbyist, has no doubt been asked by friends and family: What on earth do you think about while you’re out there for so many miles? This, as the writer Haruki Murakami noted in his What I Talk About When I Talk About Running, is almost beside the point. Sometimes he thinks while on the run; sometimes, he doesn’t. It doesn’t really matter.

I just run. I run in void. Or maybe I should put it the other way: I run in order to acquire a void.

April 21, 2016 12:51 p.m.

By Melissa Dahl

https://madridjournal.wordpress.com/2016/04/25/how-neuroscientists-explain-the-mind-clearing-magic-of-running/

How to postpone aging

I recently attended an all day event at the USC Campus, specifically at the USC Davis School of Gerontology to learn about the latest science on healthy aging from several of the world’s top aging experts. I feel inspired to share with you all what I learned. Many of you may have come across the information that I am about to share, but in case you have not, it’s never too late to learn something new!

1) One of the “hottest” question presented was “Does caloric restriction extend lifespan?” Answer: only sometimes. But if you compare a low fat diet versus a Mediterranean diet (which includes nuts and olive oil), the Mediterranean diet wins! It was shown to prevent cognitive decline and heart problems.

2) Sitting is the new smoking! Incredible to believe but the more hours you spend sitting on a daily basis decreases your health span. It is important to use your break time to get away from your workspace. And if you don’t get any breaks? Get up and take a walk to the bathroom every hour or two. Sitting can cause a multitude of heart problems, whereas smoking can cause lung problems/lung cancer. I guess you pick and choose your poison, or avoid them altogether.

3) Ovaries removed after normal menopause lessens a woman’s risk for dementia. Ovaries removed before normal menopause increases a woman’s risk for dementia.

4) A low protein, high carbohydrate diet is recommended for everyone below 65 years of age. Once you reach 65 and older, moderate (not low!) protein intake is recommended.

5) If you want to live longer and spend your later years without getting a disease or being disabled in any way, adhering to a plant based diet that includes high levels of legumes, vegetables and healthy fats (olive oil, other monounsaturated fats, nuts) is recommended. Waist goals for men to have should be less than 40 inches, and less than 35 inches for women.

6) Take care of your teeth! Get regular dental checkups! Edentulousness (having no teeth) is directly related to nutritional issues and health problems.

7) Watch the BBC video: The Men Who Made Us Fat.
8) Recommended weight loss programs are: weight watchers and TOPS (Take Off Pounds Sensibly).

9) Create your own individualized diet/meal plan that takes into consideration your age, gender, weight, and activity levels.

http://foodhabitat.com/2016/04/24/healthy-aging/

Why you can not Get a Good Sleep in Someone Else’s Bed

Half of your brain may be staying awake to keep watch when you sleep in someone else’s bed…

Whether you’re staying in a hotel or having a sleepover, you never sleep quite as well on a bed that’s not your own.
That’s an observable fact. When scientists have people sleep in a lab for an experiment, they often toss out the first night of data because people sleep so poorly. But before now, they haven’t known why.
In a small new study published in Current Biology, researchers from Brown University found out what goes on in the brain when a person sleeps in an unfamiliar place. They measured brain activity during the deep sleep of 35 young, healthy people.

The researchers found evidence that something unique indeed goes on in the brain during the first night: one hemisphere of the brain, the left, shows wakefulness while the other shows sleep.

This alertness during sleep in half of the brain has been observed in other animals—including whales, dolphins and birds—and is thought to act as a kind of night watch.

“The environment is so new to us, we might need a surveillance system so we can monitor the surroundings and we can detect anything unusual,”

says Masako Tamaki, one of the authors of the study and research associate at the Laboratory for Cognitive and Perceptual Learning at Brown University.

We’re most vulnerable when we’re asleep, in other words, and by staying partially awake, our brains might be trying to protect us.

Our brain remain active when we sleep. researchers also found that when they outfitted the people in the study with earphones, the left side showed a larger brain response to high-pitched sounds than the right—suggesting more vigilance in that hemisphere.

The study raises a lot of unanswered questions; researchers don’t yet know why they saw this effect in the left hemisphere and not the right. But interestingly, both of these asymmetries only occurred on the first night—something to keep in mind the next time you can’t fall asleep in a strange place.

Source: Time

https://scitechafrica.wordpress.com/2016/04/24/reason-you-cannot-get-a-good-sleep-in-someone-elses-bed/