“bmi for obesity in children _obesity in america comes from inactivity”

Documenting such differences does not mean the discrepancies are responsible for obesity, however. To demonstrate cause and effect, Gordon and his colleagues conducted an elegant series of experiments with so-called humanized mice, published last September in Science. First, they raised genetically identical baby rodents in a germ-free environment so that their bodies would be free of any bacteria. Then they populated their guts with intestinal microbes collected from obese women and their lean twin sisters (three pairs of fraternal female twins and one set of identical twins were used in the studies). The mice ate the same diet in equal amounts, yet the animals that received bacteria from an obese twin grew heavier and had more body fat than mice with microbes from a thin twin. As expected, the fat mice also had a less diverse community of microbes in the gut.
Lack of sleep. Not getting enough sleep or getting too much sleep can cause changes in hormones that increase your appetite. You may also crave foods high in calories and carbohydrates, which can contribute to weight gain.
Neuroscientist James Fallon discovered through his work that he has the brain of a psychopath, and subsequently learned a lot about the role of genes in personality and how his brain affects his life.
The clinical consequences of involuntary weight loss include functional decline, infections, decubitus ulcers, exacerbation of cognitive and mood disorders, and increased use of acute and long-term care facilities.4 Mechanisms for involuntary weight loss can include decreased intake, accelerated metabolism and increased caloric loss in urine or stool.5
Armamento-Villareal R, Sadler C, Napoli N, Shah K, Chode S, Sinacore DR, Qualls C, Villareal DT. Weight loss in obese older adults increases serum sclerostin and impairs hip geometry but both are prevented by exercise training. J Bone Miner Res. 2012;27:1215–1221. [PMC free article] [PubMed]
“I noticed that he was definitely thinner, but not so much as to cause great concern,” she says. Still something didn’t seem right to Wilhelm, so she asked her father about weight loss.”He said he had been to his doctor, so I didn’t worry,” she explains. “He was his usual upbeat self.”
For children and adolescents (younger than 20 years of age), overweight and obesity are based on the Centers for Disease Control and Prevention’s (CDC’s) BMI-for-age growth charts, which are available at http://www.cdc.gov/growthcharts/clinical_charts.htm:
The prevalence of obesity in men is nearly double, with 18.3% of Generation X males obese compared to 9.4% of Baby Boomers at the same age. The gap is not as profound for women, with 12.7% of Generation X females classified as obese compared to 10.7% of Baby Boomers at the same age.
The principal goal of the fat acceptance movement is to decrease discrimination against people who are overweight and obese.[219][220] However, some in the movement are also attempting to challenge the established relationship between obesity and negative health outcomes.[221]
In the past few years the number of older adults who are obese has doubled, with more than 15% of the older adult population now classified as obese. More specifically, it is estimated that the prevalence of obesity in adults ages 50 to 69 is 22.9%; for adults over age 70, the obesity rate is 15%.
The NCI Cohort Consortium is an extramural–intramural partnership within NCI’s Division of Cancer Control and Population Sciences that combines more than 50 prospective cohort studies from around the world with more than seven million participants. The studies are gathering information on energy balance–related factors from each cohort. The large size of the study will allow researchers to get a better sense of how obesity-related factors relate to less common cancers, such as cancers of the thyroid, gallbladder, head and neck, and kidney.
Children adopt the habits of their parents. A child who has overweight parents who eat high-calorie foods and are inactive will likely become overweight too. However, if the family adopts healthy food and physical activity habits, the child’s chance of being overweight or obese is reduced.

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