Stressing Fitness

We should move toward food-based instead of nutrient-based dietary guidelines.

we should be promoting whole foods, not specific nutrients which push consumers toward processed products

While nutritional science at the nutrient and molecular level is fascinating and making incredible progress, I think the most effective way to reverse health epidemics is to focus on education about foods and changing the nutritional environment.

Research suggests that as many as 25% of children in the United States report being subjected to cyberbullying, which is the use of technological devices to deliberately harass or harm other people through e-mail, text messaging, instant messaging, cell phones and online social networking sites.

And at least 20% of teens say they've engaged in sexting, which is the sending of sexually explicit photos via cell phones.

Cellphones, which in the last few years have become full-fledged computers with high-speed Internet connections, let people relieve the tedium of exercising, the grocery store line, stoplights or lulls in the dinner conversation.

The technology makes the tiniest windows of time entertaining, and potentially productive. But scientists point to an unanticipated side effect: when people keep their brains busy with digital input, they are forfeiting downtime that could allow them to better learn and remember information, or come up with new ideas.

“Almost certainly, downtime lets the brain go over experiences it’s had, solidify them and turn them into permanent long-term memories,” said Loren Frank, assistant professor in the department of physiology at the university, where he specializes in learning and memory. He said he believed that when the brain was constantly stimulated, “you prevent this learning process.”

The average person today consumes almost three times as much information as what the typical person consumed in 1960, according to research at the University of California, San Diego. And The New York Times reports that the average computer user checks 40 websites a day and can switch programs 36 times an hour.

"Just as food nourishes us and we need it for life, so too — in the 21st century and the modern age — we need technology. You cannot survive without the communication tools; the productivity tools are essential," he says. "And yet, food has pros and cons to it. We know that some food is Twinkies and some food is Brussels sprouts. And we know that if we overeat, it causes problems. Similarly, after 20 years of glorifying technology as if all computers were good and all use of it was good, science is beginning to embrace the idea that some technology is Twinkies and some technology is Brussels sprouts."

"Research shows it's possible to cushion yourself against stress, and the tactics we're using with soldiers also apply to real folks and more common types of anxiety." Key to the recent breakthroughs is a much clearer picture of how destructive stress can be. Persistent anxiety can kill neurons in brain structures concerned with memory and decisionmaking, and such damage is even visible on brain scans.

Fortunately, experts are learning that all along the continuum—from severe anxiety disorders to garden-variety worry—coping and even prevention tactics are highly effective. Here's what new PTSD science can teach all of us about outsmarting stress. If these solutions work for soldiers in Iraq and Afghanistan, they can certainly help the rest of us on the home front.

Researchers are learning that exercise doesn't just soothe stress, it also fortifies brain cells so they're less vulnerable to anxiety in the future.

Bisphenol A, a widely used chemical that Canada is banning from baby bottles, is present in the bodies of 91 percent of Canadians, according to a report that shows just how prevalent the controversial chemical is in daily life.

Studies suggesting that low exposure levels early in life can affect neural development and behavior prompted Canada to announce plans to ban its use in baby bottles. Some consumer groups, citing research linking it to cancer, obesity, diabetes and heart disease, want restrictions to be wider than that.

Statscan's Bushnik said the Canadian data on BPA is similar to that from countries like the United States and Germany.

Eating more oily fish like sardines, salmon and yellowtail could help teenage boys feel less blue, suggests a new Japanese study. The same does not appear to hold for teen girls, however.

People with metabolic syndrome -- a cluster of risk factors for heart disease, stroke and type 2 diabetes -- have a better chance of reversing it if they stick to a healthy diet, a new study shows.

A person is considered to have metabolic syndrome if they have three or more of the following risk factors: excess belly fat; high triglyceride levels (a harmful blood fat); low levels of "good" HDL cholesterol; high blood pressure; and either high blood sugar levels or type 2 diabetes.

According to the National Heart Lung and Blood Institute (NHLBI), having metabolic syndrome doubles a person's risk of heart disease and quintuples their risk of developing type 2 diabetes. Nearly a quarter of US adults have the metabolic syndrome.

Teenagers who are overweight, get little exercise, or smoke may be more likely than their peers to have recurrent headaches, researchers reported Wednesday.

Norwegian researchers found that among nearly 6,000 13- to 18-year-olds they assessed, those who were overweight, sedentary or who smoked were more likely to report suffering recurrent headaches in the past year -- including both migraines and common tension-type headaches.

Children whose mothers were exposed to certain types of pesticides while pregnant were more likely to have attention problems as they grew up, U.S. researchers reported on Thursday. The study, published in Environmental Health Perspectives, adds to evidence that organophosphate pesticides can affect the human brain.

A tenfold increase in pesticide metabolites in the mother's urine correlated to a 500 percent increase in the chances of ADHD symptoms by age 5, with the trend stronger in boys.

More Americans with psychiatric conditions are being treated with drugs alone compared with a decade ago, while "talk therapy" -- either by itself or in combination with medication -- is on the decline, a new study finds.

The results, reported in the American Journal of Psychiatry, are based on data from two government health surveys conducted in 1998 and 2007.Over that period, the percentage of Americans who said they'd had at least one psychotherapy session in the past year remained steady -- at just over 3 percent in both 1998 and 2007.However, among Americans receiving any outpatient mental health care, the proportion being treated with drugs alone rose from 44 percent in 1998 to 57 percent in 2007.Meanwhile, combined treatment with drugs and psychotherapy declined from 40 percent to 32 percent, and the use of psychotherapy alone slipped from 16 percent in 1998 to about 10 percent in 2007.National spending on psychotherapy also declined -- from an estimated total of $11 billion in 1998 to $7 billion in 2007. Overall spending on mental health care remained fairly steady, however -- at $15.4 billion in 1998 and $16 billion in 2007- suggesting an increase in the proportion of mental health spending devoted to drug therapies.

"Mental health care," he said, "is evolving in a way that means more people are receiving treatment, but are not necessarily getting the most effective therapy."

"Even if you're aerobically fit, it helps to be limber, too, so your body can easily adapt to physical stressors,"

Although countless studies have shown how beneficial exercise is for your body and mind (it may do everything from reducing the risk of some cancers to helping improve memory), less attention has been paid to flexibility.

"Flexibility is the third pillar of fitness, next to cardiovascular conditioning and strength training

It was a primitive trip with a sophisticated goal: to understand how heavy use of digital devices and other technology changes how we think and behave, and how a retreat into nature might reverse those effects.