Group items tagged

According to a recent study, regular exercise improves the ability of inactive, overweight children to do better in math. Researchers at Georgia Health Sciences University studied 171 sedentary and overweight 7- to 11-year-olds in an effort to identify what happens to children's brains with regular, vigorous exercise.

After allowing the kids to engage in fun, playful exercises, such as running games, hula hooping and jump roping, which raised their heart rates to 79 percent of their maximum, scientists used the Cognitive Assessment System and Woodcock-Johnson Tests of Achievement III, tests that measure abilities such as planning and academic skills, to identify brain activity before and after the bouts of physical activity. Students showed an increase in complex thinking and decision making -- the areas of the brain that are used in math. In fact, the more the children exercised, the more their brains responded. Intelligence scores increased an average 3.8 points in those exercising 40 minutes per day for three months. Those who exercised just 20 minutes a day also benefited, just in a smaller dose. Researchers noted that the improved math skills were "remarkable," since no math lessons were given as part of the study. This suggests longer, more sustained periods of vigorous physical activity throughout the entire school year could produce even higher results. And researchers believe all children -- not just those who are overweight -- could benefit with improved reasoning and complex thinking skills.

In a country where one-third of our children are overweight, it is increasingly important to motivate schools and parents to encourage daily physical activity. The Center for Disease Control recommends at least 60 minutes of exercise a day for children, yet there is no federal mandate for minimum standards in schools. Each state is responsible for setting their own requirements, and unfortunately, with increasing budget cuts, not all schools comply or engage the children in quality-rich physical education.

Children of depressed parents are two to three times as likely to have major depression. Maternal depression in particular has been shown to have serious effects on development, primarily through an absence of responsiveness — the parent’s conscious and consistent mirroring and reciprocity of an infant’s gaze, babble and actions. “Depressed mothers often respond to their babies from the beginning in ways that dampen their enthusiasm and joy,” says Alicia Lieberman, a professor in the department of psychiatry at the University of California, San Francisco. This is problematic, as 10 to 20 percent of mothers go through depression at some point, and 1 in 11 infants experiences his mother’s depression in the first year.

Many researchers, particularly those with medical training, are eager to identify some kind of a “biologic marker” to make diagnosis scientifically conclusive. Recent studies have looked at the activity of cortisol, a hormone the body produces in response to stress. In preschoolers who have had a diagnosis of depression, as in depressed adults, cortisol levels escalate under stressful circumstances and then fail to recover with the same buoyancy as in typical children.

But in adults, cortisol reactivity can be an indication of anxiety. Other research has found that in young children, anxiety and depression are likewise intertwined. At Duke, Egger found that children who were depressed as preschoolers were more than four times as likely to have an anxiety disorder at school age. “Are these two distinct but strongly related syndromes?” asks Daniel Pine of the N.I.M.H. “Are they just slightly different-appearing clinical manifestations of the same underlying problem? Do the relationships vary at different ages? There are no definitive answers.”

The adventures of Paul, Black and Breinan offer a glimpse into a forgotten aspect of the running boom of the late 1970s. Preternaturally self-disciplined, they were among about 75 children (ages 8 to 13) who tackled the early years of the New York City Marathon in a time of novelty and naïveté. Organizers were uneasy about young runners, but it was not until 1981, records show, that age 16 became the requirement. New York’s official minimum age became 18 in 1988, after an advisory set by the International Marathon Medical Directors Association in the early 1980s, and reasserted in 2001. With no conclusive study, physicians still debate risks to children who compete in marathons, like muscular-skeletal injuries, stunted growth, burnout, parental pressures and the ability to handle heat stress.

Some marathons — Houston and Twin Cities in Minnesota — allow teenagers or admit younger runners on a case-by-case basis. Los Angeles has a program for schoolchildren ages 12 to 18.

Running for exercise is a popular way to motivate children to be physically active. Running-related injuries are well studied in adults but little information exists for children and adolescents. Through use of the National Electronic Injury Surveillance System database, cases of running-related injuries were selected by using activity codes for exercise (which included running and jogging). Sample weights were used to calculate national estimates. An estimated 225 344 children and adolescents 6 to 18 years old were treated in US emergency departments for running-related injuries. The annual number of cases increased by 34.0% over the study period. One third of the injuries involved a running-related fall and more than one half of the injuries occurred at school. The majority of injuries occurred to the lower extremities and resulted in a sprain or strain. These findings emphasize the need for scientific evidence-based guidelines for pediatric running. The high proportion of running-related falls warrants further research.

Obese children in America are much less physically active, consume larger quantities of food during school meals, and watch much more TV than their normal-weight schoolmates, researchers from the University of Michigan Medical School revealed in The American Heart Journal. Lifestyle is by far the major driving force behind childhood obesity in the USA, and not heredity, the authors stressed after examining data on check-ups of 1,003 Michigan sixth-graders in a school-based health program.

The obese children in this study tended to eat a school lunch rather than a packed one made at home, and spent a considerable amount of time either playing video games or watching television.

58% of the obese children in the study had watched at least two hours of TV the day before, the authors reported, compared to 41% among the other kids. 34% of non-obese children ate school lunches regularly, compared to 45% of the obese ones. Regular exercise, being a member of a school sports team, and rates of physical activity were considerably lower among the obese pupils.

Poor eating and activity habits, not genetics, are the underlying causes for most cases of adolescent obesity, new research suggests. The finding stems from an analysis involving more than 1,000 Michigan sixth-grade students who participated in the Project Healthy Schools program, which is in place in 13 middle schools across the state.

The authors noted that, in 1980, just 6.5 percent of U.S. children aged 6 to 11 years were considered obese, but that percentage rose to nearly 20 percent by 2008. The recent study found that 15 percent of the participants were obese. And almost all had poor eating habits. Nearly one-third of all the students said they drank a soda the day before, while fewer than half said they could recall having eaten two portions of fruits and vegetables in the same time frame. And while 34 percent of non-obese kids consumed lunches provided by their school, that figure rose to 45 percent among obese students. Only one-third of all the kids reported exercising a half hour for five days during the previous week. Obese children were much less likely than non-obese kids to participate in regular exercise and/or physical education classes, and less likely to be a part of a sports team. Among obese children, 58 percent reported watching two hours of TV in the past day. That compared with 41 percent of non-obese kids.

Being a 'happy' teenager is linked to increased well-being in adulthood, new research finds.

For the first time, researchers from the University of Cambridge and the MRC Unit for Lifelong Health and Ageing have analysed the link between a positive adolescence and well-being in midlife. Using information from 2776 individuals who participated in the 1946 British birth cohort study, the scientists tested associations between having a positive childhood and well-being in adulthood.

teenagers rated positively by their teachers were significantly more likely than those who received no positive ratings to have higher levels of well-being later in life, including a higher work satisfaction, more frequent contact with family and friends, and more regular engagement in social and leisure activities. Happy children were also much less likely than others to develop mental disorders throughout their lives - 60% less likely than young teens that had no positive ratings.

Canada’s guidelines on sedentary activity (an oxymoron to be sure) released last week say children should spend no more than two hours a day in front of a TV, videogame or computer screen.

Only 7 per cent of children meet Canada’s physical activity guidelines. (Adults don’t fare much better at 15 per cent.)

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.

Between 1988-94 and 2005-06, the percentage of teens with hearing loss jumped by about a third, from 15% of 12-to-19-year-olds to 19.5%.

Diet and nutrition, as well as exposure to toxins, might be factors. Living in poverty is also associated with greater risk of hearing loss among youngsters, as children in lower-income families may not be getting adequate nutrition to support proper development of the auditory system.

Difficulty in hearing among youngsters has been linked to slower language development, poorer performance in school and lower self-esteem. And because social skills are dependent on language, previous studies have found that even slight hearing loss in elementary and high school students can result in progressively lower scores on communication tests and greater anxiety.

Besides its importance for maintaining weight and reducing health risks during a childhood obesity epidemic, physical activity may prove to be a simple, important method of enhancing aspects of children's mental functioning that are central to cognitive development. This information may persuade educators to implement vigorous physical activity.

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.

American adults have a significantly higher rate of obesity than their neighbors to the north, a new study says. About 24 percent of Canadians are obese compared to more than 34 percent of Americans, according to the U.S. Centers for Disease Control and Prevention study released Wednesday.

The two countries have different racial demographics. The United States has more black and Hispanic people, and both have higher rates of obesity. But even looking solely at white people, there was still a big difference - a 26 percent obesity rate in Canada compared to 33 percent in the United States.

Another mystery: In children there was little difference. The childhood obesity rate was 15.5 percent in the United States and 12 percent in Canada, but the difference was not statistically significant.