Focus on an "obesogenic" environment rather than kids behavior to battle obesity

According to researchers reviewing numerous anti-childhood obesity programs, the focus to prevent it should be on strategies that seek to change children’s environments rather than their behavior.

The researchers said that environmental approaches improving physical activity and dietary habits are the key to prevention measures.

To find which forms of intervention could have a maximum effect to help prevent obesity in children, an international team of researchers updated a previous Cochrane Review by searching for new evidence from existing studies to see which forms of intervention work best.

Researchers targeted children ages 6-12 with school-based programs that encourage healthy eating, physical activity, and positive attitudes to body image.

The researchers highlighted the key strategies that could be considered for prevention measures including healthy eating, physical activity and body image in school curricula.

The key findings are:

• Increasing physical activity and the development of fundamental movement skills during the school week.
• Improving the nutritional quality of food supplied in schools.
• Creating environments and cultural practices within schools that support children eating healthier foods and being active throughout each day.
• Professional development and capacity building activities which help to support teachers and other staff as they implement health promotion strategies and activities.
• Giving more attention to parent support and home activities that encourage children to be more active, eat more nutritious foods and spend less time in screen-based activities.

Source: http://www.medicaldaily.com/news/20111207/8141/how-to-prevent-childhood-obesity-prevention-measures-for-child-obesitywatch-your-child%C3%A2%E2%82%AC%E2%84%A2s-dietch.htm

Are diet and exercise enough to lose weight and keep it low?

A new study, published in The New England Journal of Medicine, shows that regaining weight after a period of diet and exercise may be inevitable due to hormones.

Australian researchers found that after losing weight, hormone levels - particularly those that influence hunger - shifted in the body, leading to increase appetites and weight regain.

The study involved 50 adults with a body mass index (BMI) between 27 and 40, who were on a diet and exercise for 10 weeks. After an initial loss scientists found that the levels of appetite-regulating hormones changed, resulting in a regain of 1/3 of the lost weight over the course of a year.

The results of the Australian study corroborate findings in another paper released earlier this year, in which researchers from Spain confirmed that people with high levels of the hormone leptin and low levels of ghrelin are more likely to gain the weight they lost.

Instead of playing the diet and exercise message on repeat - an ineffective longterm weight loss strategy for some - the Spanish authors suggested that endocrinologists and nutritionists consider the possibility of hormonal imbalances when developing weight loss strategies.

Source: http://www.nydailynews.com/life-style/health/diet-exercise-fight-obesity-study-article-1.971052#ixzz1cjDgPJ3S

Losing weight can be fun!

A new study, published in the "Applied physiology, nutrition, and metabolism" journal has shown that  interactive video game stationary cycling (GameBike) is as efficient as stationary cycling to music for losing weight.

This was observed in a group of thirty overweight or obese adolescents aged 12-17 years, who were stratified by gender and randomized to video game or music condition to complete two 60-min sessions a week for 10 weeks.

Both interventions produced significant improvements in submaximal indicators of aerobic fitness as measured by a graded cycle ergometer protocol. Also, when collapsed, the exercise modalities reduced body fat percentage and total cholesterol.

Source: Applied physiology, nutrition, and metabolism

Exercise helps overweight children think better, do better in math

Regular exercise improves the ability of overweight, previously inactive children to think, plan and even do math, Georgia Health Sciences University researchers report.

They hope the findings in 171 overweight 7- to 11-year-olds – all sedentary when the study started – gives educators the evidence they need to ensure that regular, vigorous physical activity is a part of every school day, said Dr. Catherine Davis, clinical health psychologist at GHSU’s Georgia Prevention Institute and corresponding author on the study in Health Psychology

To measure cognition, researchers used the Cognitive Assessment System and Woodcock-Johnson Tests of Achievement III that measure abilities such as planning and academic skills such as math and reading. A subset of the children received functional magnetic resonance imaging highlighting increased or decreased areas of brain activity.

MRIs showed those who exercised experienced increased brain activity in the prefrontal cortex – an area associated with complex thinking, decision making and correct social behavior – and decreased activity in an area of the brain that sits behind it. The shift forward appears consistent with more rapidly developing cognitive skills, Davis said.

And the more they exercised, the better the result. Intelligence scores increased an average 3.8 points in those exercising 40 minutes per day after school for three months with a smaller benefit in those exercising 20 minutes daily.

Activity in the part of their brain responsible for so-called executive function also increased in children who exercised. “In kids you just don’t know what impact you are going to have when you improve their ability to control their attention, to behave better in school, to make better choices,” Davis notes. “Maybe they will be more likely to stay in school and out of trouble.”

Cognitive improvements likely resulted from the brain stimulation that came from movement rather than resulting cardiovascular improvements, such as increased blood and oxygen supplies, Davis said. “You cannot move your body without your brain.”

The researchers hypothesize that such vigorous physical activity promotes development of brain systems that underlie cognition and behavior. Animal studies have shown that aerobic activity increases growth factors so the brain gets more blood vessels, more neurons and more connections between neurons. Studies in older adults have shown exercise benefits the brain and Davis’s study extends the science to children and their ability to learn in school.

Co-authors include Dr. Jennifer E. McDowell, neuroscientist, and Dr. Phillip Dr. Tomporowski, exercise and cognition expert, at the University of Georgia.

From: Georgia Health Science University News. http://news.georgiahealth.edu/archives/3263

WHO calls for junk food ban in schools, playgrounds

Junk food should not be sold in schools and playgrounds, the World Health Organisation said Friday in a series of recommendations aimed at promoting a healthy diet and cutting child obesity.
However it fell short of calling for a ban on advertising directed at children for foods high in saturated fats, sugars or salt, opting instead to ask member states to "consider the most effective approach to reduce" such marketing.
The non-binding recommendations will be put to a high-level meeting on the prevention and control of non-communicable diseases during September's General Assembly in New York, WHO officials said.
"Settings where children gather should be free from all forms of marketing of foods high in saturated fats, trans-fatty acids, free sugars or salt," said the UN health agency.
"Such settings include, but are not limited to, nurseries, schools, school grounds and pre-school centres, playgrounds, family and child clinics and paediatric services and during any sporting and cultural activities that are held on these premises," it added .
Some 43 million pre-school children are obese or overweight, according to WHO data.
"Children throughout the world are exposed to marketing of foods high in fat, sugar or salt, which increases the potential of younger generations developing noncommunicable diseases during their lives," it said.
Six out of ten deaths every year are due to cardiovascular diseases, cancers, diabetes and chronic lung diseases, the WHO warned, pointing out that a common factor of the four main diseases is poor diet.

Source: Google news. http://www.google.com/hostednews/afp/article/ALeqM5jfzUeW7BjDuqLjipN5Meuy969_Ew?docId=CNG.8c7c2d37b80a7efbfd66908fa452bb99.2f1