Want to live a long life? Run

WASHINGTON (Reuters) - People who want to live a long and healthy life might want to take up running.

A study published on Monday shows middle-aged members of a runner's club were half as likely to die over a 20-year period as people who did not run.

Running reduced the risk not only of heart disease, but of cancer and neurological diseases such as Alzheimer's, researchers at Stanford University in California found.

"At 19 years, 15 percent of runners had died compared with 34 percent of controls," Dr. Eliza Chakravarty and colleagues wrote in the Archives of Internal Medicine.

Any type of vigorous exercise will likely do the trick, said Stanford's Dr. James Fries, who worked on the study.

"Both common sense and background science support the idea that there is nothing magical about running per se," Fries said in a telephone interview. "It is the regular physical vigorous activity that is important."

The team surveyed 284 members of a nationwide running club and 156 similar, healthy people as controls. They all came from the university's faculty and staff and had similar social and economic backgrounds, and all were 50 or older.

Starting in 1984, each volunteer filled out an annual survey on exercise frequency, weight and disability for eight activities -- rising, dressing and grooming, hygiene, eating, walking, reach, hand grip and routine physical activities.

Most of the volunteers did some exercise, but runners exercised as much as 200 minutes a week, compared to 20 minutes for the non-runners.

At the beginning, the runners were leaner and less likely to smoke compared with the controls. And they exercised more over the whole study period in general.

"Over time, all groups decreased running activity, but the runners groups continued to accumulate more minutes per week of vigorous activity of all kinds," the researchers wrote.

"Members of the running groups had significantly lower mean disability levels at all time points," they added.

The team also set out to answer whether taking up running late in life would benefit, and whether people who stopped exercising began to pay a price as they aged.

Most of the runners have stopped running as they reached their 70s, Fries said. But it was difficult to find people who totally stopped exercising. "Almost all of them did something else. They continued their vigorous exercise," he said.

People who took up exercise when they were older also improved their health, he said.

The study also showed that people cannot use the risk of injury as an excuse not to run -- the runners had fewer injuries of all kinds, including to their knees.

Eating fish high in fatty acids may help prevent memory loss

LONDON (Reuters) - Eating tuna and other fatty fish may help prevent memory loss in addition to reducing the risk of stroke, Finnish researchers said on Monday.

People who ate baked or broiled -- but not fried -- fish high in omega-3 fatty acids have been found to be less likely to have "silent" brain lesions that can cause memory loss and dementia and are linked to a higher risk of stroke, said Jyrki Virtanen of the University of Kuopio in Finland.

"Previous findings have shown that fish and fish oil can help prevent stroke, but this is one of the only studies that looks at fish's effect on silent brain (lesions) in healthy, older people,," Virtanen, who led the study, said in a statement.

Omega-3 fatty acids are also found in salmon, mackerel, herring, sardines, and in other foods such as walnuts. They have been shown to provide an anti-inflammatory effect and have been linked to a lower risk of heart disease.

The Finnish team studied 3,660 people aged 65 and older who underwent brains scans five years apart to detect the silent brain lesions, or infarcts, found in about 20 percent of otherwise healthy elderly people

The researchers found that men and women who ate omega-3-rich fish three times or more per week had a nearly 26 percent lower risk of having silent brain lesions.

Eating just one serving per week led to a 13 percent reduced risk, compared to people whose diets did not include this type of fish, the researchers reported in the journal Neurology.

Fried fish for some reason did not appear to have the same benefits, the researchers added.

"While eating tuna and other types of fish seems to help protect against memory loss and stroke, these results were not found in people who regularly ate fried fish," Virtanen said.