The brain also needs a "cognitive rest," they say, by restricting activities like video games, texting and watching TV.

VOA: special.2009.10.28

The findings suggest that even a half-hour walk at a quick speed every day could lower the risk of cognitive impairment.

VOA: special.2011.07.27

Women who said they were physically active even once a week showed less cognitive impairment as measured by a test.

VOA: special.2010.07.07

"People who were physically active on a regular basis had lower risk of cognitive impairments in late life.

VOA: special.2010.07.07

That was the finding of a new study of cognitive impairment, or a loss in mental abilities.

VOA: special.2010.07.07

James Burke of Duke University is one of the authors of a study reviewing previous research on cognitive decline.

VOA: standard.2010.06.17

A new study has failed to find any conclusive evidence that lifestyle changes can prevent cognitive decline in older adults.

VOA: standard.2010.06.17

"I think that by having people adopt a healthy lifestyle, both from a medical standpoint as well as nutritional and cognitive stimulation standpoint, that we can reduce the incidence of cognitive decline, which will be proof that these factors are, in fact,important."

VOA: standard.2010.06.17