The people drank small amounts of what scientists call doubly labeled water. It contains forms of hydrogen and oxygen that can mark, or label, these elements within body water. This way scientists can measure energy use through urine tests.
Laura Middleton says the research showed that even low-intensity activity reduced the risk of thinking problems and memory loss.
LAURA MIDDLETON: "Those with higher activity energy expenditure had ninety percent reduced risk of incident cognitive impairment over the follow-up period compared to those with very low activity energy expenditure.”
The study is published in the Archives of Internal Medicine.
In a second study, French researchers reported on exercise and dementia in women with heart risks like obesity or diabetes.
Marie-Noel Vercambre of the Foundation for Public Health in Paris led the study. The findings suggest that even a half-hour walk at a quick speed every day could lower the risk of cognitive impairment.
Dr. Eric Larson of the Group Health Research Institute in Seattle, Washington, wrote a commentary about the studies. He says the findings add to the evidence about the mental value of physical activity.
ERIC LARSON: "It's not obvious to people that exercise would make your brain healthier. And as each study does more detailed analyses of special groups or a different way of making the measurements, it just makes the scientific basis for this relationship a lot more convincing."
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2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25