It may seem counterintuitive, but exercise can be beneficial for people suffering from arthritis and other muscle and joint conditions. A new study at Hospital for Special Surgery (HSS) finds that older adults experienced less pain, reduced stiffness and less fatigue after participating in a hospital-based exercise program. "The study adds to the growing body of evidence that exercise can help people with muscle and joint conditions," said Sandra Goldsmith, MA, MS, RD, director of Public and Patient Education at Hospital for Special Surgery. Up to 50 million adults ...

Home- and community-based HIV testing and counselling services can achieve high participation uptake in rural Africa but reach different populations within a community and should be provided depending on the groups that are being targeted, according to new research published in this week's PLOS Medicine by Niklaus Labhardt from the Swiss Tropical and Public Health Institute, and colleagues from SolidarMed, a Swiss non-governmental Organization for Health in Africa. Annually, about 2.3 million people become newly infected with HIV, the virus that causes AIDS. A key step ...

Neuroscientists from the John B. Pierce Laboratory and Yale School of Medicine have discovered that mice can detect minute differences in the temporal dynamics of the olfactory system, according to research that will be published on December 16 in the open access journal PLOS Biology. The research team used light in genetically-engineered mice to precisely control the activity of neurons in the olfactory bulbs in mice performing a discrimination task. This approach to controlling neural activity, called optogenetics, allows for much more precise control over the activity ...

CORVALLIS, Ore. - Introverted employees are more likely to give low evaluations of job performance to extroverted co-workers, giving introverts a powerful role in workplaces that rely on peer-to-peer evaluation tools for awarding raises, bonuses or promotions, new research shows. Introverts consistently rated extroverted co-workers as worse performers, and were less likely to give them credit for work performed or endorse them for advancement opportunities, according to two studies from researchers at Oregon State University, the University of Florida and University ...

VIDEO: Daniel Glavin of NASA's Goddard Space Flight Center discusses the discovery of organic matter on Mars and other recent results from the MSL Curiosity rover. Click here for more information. The team responsible for the Sample Analysis at Mars (SAM) instrument suite on NASA's Curiosity rover has made the first definitive detection of organic molecules at Mars. Organic molecules are the building blocks of all known forms of terrestrial life, and consist of a wide variety ...

This news release is available in German. This news release is available in German. Seeing - recognising - acting. These three words describe how a sensory input can lead to a targeted movement. However, very little is known about how and where the brain converts external inputs into behavioural responses. Now, scientists at the Max Planck Institute of Neurobiology in Martinsried have been able to shed light on important neural circuitry involved in the prey capture behaviour exhibited by young zebrafish. The findings show that neurons in the retina of the ...

EAST LANSING, Mich. - The KISS concept ¬- keep it simple, stupid - may work for many situations. However, when it comes to evolution, complexity appears to be key for prosperity and propagating future generations. Research led by Michigan State University's BEACON Center for the Study of Evolution in Action shows that organisms sometimes have to use increasingly complex defenses to continue evading parasites' attacks and live longer than their simpler cousins. The results, published in the current issue of PLOS Biology, show how the virus-resistant hosts live better, ...

VIDEO: New research suggests that children who receive many material rewards from their parents will likely continue rewarding themselves with material goods when they are grown -- well into adulthood --... Click here for more information. COLUMBIA, Mo. - With the holiday season in full swing and presents piling up under the tree, many parents may be tempted to give children all the toys and gadgets they ask for or use the expectation of gifts to manage children's behavior. Now, ...

Researchers from Johns Hopkins have found that dense mats of interacting bacteria, called biofilms, were present in the majority of cancers and polyps, particularly those on the right side of the colon. The presence of these bacterial bunches, they say, may represent an increased risk for colon cancer and could form the basis of new diagnostic tests. Like tooth plaque and slime on pond stones, bacterial biofilms may coat the mucus layer of cells lining the colon, causing inflammation and some noncancerous bowel diseases. The bacteria "invade the layer of mucus that protects ...

DURHAM, N.C. -- American children are generally safer and better-educated than they have been in 20 years, a new report from Duke University finds. Stubborn problems remain, including high rates of child poverty and a still-raging obesity epidemic, the 2014 National Child and Youth Well-Being Index Report notes. But "compared to 20 years ago, U.S. children are doing pretty well," said the report's lead author, Kenneth Land, the John Franklin Crowell Professor of Sociology at Duke. The report is based on the Duke Child Well-Being Index, a comprehensive measure of ...

AMES, Iowa - As a glacier's sliding speed increases, the bed beneath the glacier can grow slipperier, according to laboratory experiments conducted by Iowa State University glaciologists. They say including this effect in efforts to calculate future increases in glacier speeds could improve predictions of ice volume lost to the oceans and the rate of sea-level rise. The glaciologists - Lucas Zoet, a postdoctoral research associate, and Neal Iverson, a professor of geological and atmospheric sciences - describe the results of their experiments in the Journal of Glaciology. ...

New Year's resolution-makers should beware of skewed perceptions. People tend to believe good behaviors are more beneficial in reaching goals than bad behaviors are in obstructing goals, according to a University of Colorado Boulder-led study. A dieter, for instance, might think refraining from eating ice cream helps his weight-management goal more than eating ice cream hurts it, overestimating movement toward versus away from his target. "Basically what our research shows is that people tend to accentuate the positive and downplay the negative when considering how ...

New research from The Johns Hopkins University suggests that the amount of mitochondrial DNA (mtDNA) found in peoples' blood directly relates to how frail they are medically. This DNA may prove to be a useful predictor of overall risk of frailty and death from any cause 10 to 15 years before symptoms appear. The investigators say their findings contribute to the scientific understanding of aging and may lead to a test that could help identify at-risk individuals whose physical fitness can be improved with drugs or lifestyle changes. A summary of the research was published ...

DURHAM, N.C. -- Ancient DNA extracted from the bones and teeth of giant lemurs that lived thousands of years ago in Madagascar may help explain why the giant lemurs went extinct. It also explains what factors make some surviving species more at risk today, says a study in the Journal of Human Evolution. Most scientists agree that humans played a role in the giant lemurs' demise by hunting them for food and forcing them out of habitats. But an analysis of their DNA suggests that the largest lemurs were more prone to extinction than smaller-bodied species because of their ...

The remnants of Tropical Cyclone Bakung continue to linger in the Southern Indian Ocean, and NOAA-NASA's Suomi NPP (Suomi NPP) satellite is one satellite keeping an eye on the storm for possible re-development. On Dec. 16, the remnant low pressure area formerly known as Bakung was centered near 7.4 south longitude and 83.8 east latitude. That's about 670 nautical miles (771 miles/1,241 km) east of the coral atoll known as Diego Garcia. The atoll is part of the British Indian Ocean Territory. At 07:31 UTC (2:31 a.m. EST) NOAA-NASA's Suomi NPP satellite passed over Bakung's ...

For people with asthma or severe allergies, medical devices like inhalers and epinephrine autoinjectors, such as EpiPen, can be lifesaving. However, a new study by the University of Texas Medical Branch at Galveston indicates that a majority of patients often do not use these devices correctly, resulting in less effective delivery of these medications and potentially disastrous outcomes. "Improving how patients use these devices leads to better clinical outcomes," said Dr. Rana Bonds, lead author and assistant professor in the department of internal medicine, division ...

A University of Alberta economics professor has discovered a link between contraband cigarette use and illicit drug use among Canadian teens. Professor Mesbah Sharaf, a health economics lecturer at the University of Alberta in Canada, recently published a joint study with the University of Waterloo titled "Association Between Contraband Tobacco and Illicit Drug Use Among High School Students in Canada" in The Journal of Primary Prevention. The study shows that 31 per cent of adolescent smokers in Canada between grades 9 and 12 use contraband tobacco and indicates ...

To feed the world's growing population--expected to reach nine billion by the year 2050--we will have to find ways to produce more food on less farmland, without causing additional harm to the remaining natural habitat. A feature review, to be published on December 16th in the Cell Press journal Trends in Plant Science, points the way to intensifying agriculture sustainably by fixing weaknesses that have sprung up quite by accident in the process of traditional crop breeding over the course of thousands of years. Michael G. Palmgren of the University of Copenhagen and ...

New Haven, Conn. -- An analysis of the ongoing Ebola outbreak reveals that transmission of the virus occurs in social clusters, a finding that has ramifications for case reporting and the public health. Prior studies of Ebola transmission were based on models that assumed the spread of infection occurred between random pairs of individuals. However, because transmission of the virus happens most often in hospitals, households, and funeral settings, Yale researchers, and an international team of co-authors, investigated the possibility of clustered transmission, or spread ...

(SALT LAKE CITY)--In addition to incurring serious dental problems, memory loss and other physical and mental issues, methamphetamine users are three times more at risk for getting Parkinson's disease than non-illicit drug users, new research from the University of Utah and Intermountain Healthcare shows. The researchers also observed that women who use methamphetamine may be nearly five times more likely to get Parkinson's disease compared to women who don't use drugs. Although findings suggest the risk in women may be higher than that in men, additional studies are ...

ITHACA, N.Y. - Researchers have understood very little about how blood and lymphatic vessels form in the mammalian gut - until now. A new Cornell University study reports for the first time how arteries form to supply the looping embryonic gut with blood, and how these arteries guide development of the gut's lymphatic system. The study, published online Dec. 4 as the cover story of the journal Developmental Cell, provides a new avenue to explore treatments to prevent cancer metastasis and gut-specific lymphatic diseases. Lymphatic vessels are the main channels for spreading ...

WASHINGTON D.C., December 16, 2014 -- Although currently available diagnostic screening systems for breast cancer like X-ray computed tomography (CT) and mammography are effective at detecting early signs of tumors, they are far from perfect, subjecting patients to ionizing radiation and sometimes inflicting discomfort on women who are undergoing screening because of the compression of the breast that is required to produce diagnostically useful images. A better, cheaper, and safer way to look for the telltale signs of breast cancer may be with microwaves, said Neil ...

WASHINGTON D.C., December 16, 2014 -- What do you get when you wrap a thin sheet of the "wonder material" graphene around a novel multifunctional sulfur electrode that combines an energy storage unit and electron/ion transfer networks? An extremely promising electrode structure design for rechargeable lithium-sulfur batteries. Lithium-sulfur batteries are of great commercial interest because they boast theoretical specific energy densities considerably greater than those of their already-well-established cousin, lithium ion batteries. In the journal APL Materials, from ...

Analysts at the Energy Department's National Renewable Energy Laboratory (NREL) have used statistical analyses and detailed case studies to better understand why solar market policies in certain states are more successful. Their findings indicate that while no standard formula for solar implementation exists, a combination of foundational policies and localized strategies can increase solar photovoltaic (PV) installations in any state. In the report, "The Effect of State Policy Suites on the Development of Solar MarketsPDF," NREL researchers examined a variety of policy- ...

People who occupy the extreme ends of the political spectrum, whether liberal or conservative, may be less influenced by outside information on a simple estimation task than political moderates, according to new research published in Psychological Science, a journal of the Association for Psychological Science. The research, conducted by psychological scientists Mark J. Brandt and Anthony Evans of Tilburg University and Jarret T. Crawford of The College of New Jersey, suggests that because political extremists hold their own beliefs to be superior to the beliefs of others, ...