Much has been made about who or what is to blame for the “obesity epidemic” and what can or should be done to stem the tide of rising body mass among the U.S. population.
A new book by a UCLA sociologist turns these concerns on their head by asking two questions. First, how and why has fatness been medicalized as “obesity” in the first place? Second, what are the social costs of this particular way of discussing body size? (more…)
A recent review of research co-authored by Rose McDermott highlights the role that genes play in political preferences, an area of study that began to draw significant attention in the last decade. McDermott speaks with Courtney Coelho about this growing field of research, its evolutionary roots, and whether it means anything for the prediction of future election results.
The connection between biology and political science is relatively new, but it’s one that has grown rapidly, with a boom in research linking genetics and political preferences in the last decade. Rose McDermott, professor of political science, has done research on this topic and recently co-authored a review, published in Trends in Genetics, of studies in recent years. (more…)
Despite the increasing awareness of the problem of obesity in the United States, most Americans don’t know whether they are gaining or losing weight, according to new research from the Institute for Health Metrics and Evaluation, also known at IHME, at the University of Washington.
Obesity increased in the U.S. between 2008 and 2009, but in response to the questions about year-to-year changes in weight that were included in the most widespread public health survey in the country, on average, people said that they lost weight. Men did a worse job estimating their own weight changes than women. And older adults were less attuned to their weight changes than young adults. The findings are being published in the article “In denial: misperceptions of weight change among adults in the United States” in the August edition of Preventive Medicine. (more…)
Taking in too many calories far outweighs getting too little exercise as a cause of obesity, according to a study of a hunter-gatherer society co- authored by Yale anthropologist Brian Wood and recently published in the July issue of the journal PLoS One.
Using state-of-the-art technology to measure the daily energetic expenditure of the Hazda, a foraging people of Tanzania, Wood and co-authors Herman Pontzer (Hunter College) and David Raichlen (University of Arizona) discovered that even though these last remaining hunter-gatherers in Africa are quite physically active, they expend on average no more calories in a day than the adult population of the industrialized world. Given the total lack of obesity among the Hadza, whose average daily calorie consumption is far lower than that found in the developed world, the researchers concluded that increased caloric intake is the main source of rising obesity in Western populations. (more…)
Researchers at Yale School of Medicine have zeroed in on a set of neurons in the part of the brain that controls hunger, and found that these neurons are not only associated with overeating, but also linked to non-food associated behaviors, like novelty-seeking and drug addiction.
Published in the June 24 online issue of Nature Neuroscience, the study was led by Marcelo O. Dietrich, postdoctoral associate, and Tamas L. Horvath, the Jean and David W. Wallace Professor of Biomedical Research and chair of comparative medicine at Yale School of Medicine.
In attempts to develop treatments for metabolic disorders such as obesity and diabetes, researchers have paid increasing attention to the brain’s reward circuits located in the midbrain, with the notion that in these patients, food may become a type of “drug of abuse” similar to cocaine. Dietrich notes, however, that this study flips the common wisdom on its head. (more…)
COLUMBIA, Mo. – Childhood obesity has increased dramatically throughout the past 40 years and has been tied to many health problems. Now, a University of Missouri researcher has found that children’s weight is associated with their math performance.
“The findings illustrate the complex relationships among children’s weight, social and emotional well-being, academics and time,” said Sara Gable, associate professor in the MU Department of Nutrition and Exercise Physiology, who led the study.
Gable looked at more than 6,250 children from the Early Childhood Longitudinal Study-Kindergarten Cohort, a nationally representative sample. The children were followed from the time they started kindergarten through fifth grade. At five points in time, parents provided information about their families, teachers reported on the children’s interpersonal skills and emotional well-being, and children were weighed and measured; they also took academic tests. (more…)
Older people are a benefit, rather than a burden, to the economy and society according to a new report from the UCL School of Pharmacy.
The report, Active Ageing: Live Longer and Prosper (produced with financial support from Alliance Boots) refutes the view that older people are a major source of economic problems such as reduced international competitiveness. It provides evidence that the benefits of living longer will outweigh the additional health and social care costs of population ageing.
“All too often old age is seen as a time of increasing dependency, vulnerability and frailty. But older people already contribute significantly to their families’ and wider communities’ wellbeing,” said Dr Jennifer Gill (UCL School of Pharmacy), co-author of the report. (more…)
Aerobic exercise triggers a reward system in the body of long-distance running creatures like humans and dogs, but not ferrets, a study led by UA anthropologist David Raichlen suggests.
In the last century, something unexpected happened: Humans became sedentary. We traded in our active lifestyles for a more immobile existence.
But these were not the conditions under which we evolved – our hunter-gatherer predecessors were long-distance endurance athletes. (more…)
