( Researchers using a sophisticated test ...)Physical Activity of any kind to Prolong Life,Health

Researchers using a sophisticated test have found that any kind of exercise will help to prolong your life.//

According to lead researcher, Todd M. Manini, an exercise physiologist at the U.S. National Institute on Aging, "There are plenty of reports out there saying that self-reported exercise like running or jogging is beneficial. We wanted to see if just usual daily activity had a protective value."

His research team conducted a six-year study on 302 people between 70 and 82 years of age and concluded that any sort of energy expenditure through physical activity was associated with a lower risk of death.

While the results of the research has not exactly been a new revelation what was unusual about this study was the exquisitely detailed measurements used to determine levels of physical activity. The results of the research have been published in the July 12 issue of the Journal of the American Medical Association.

In the study, volunteers were made to drink water containing two harmless isotopes, oxygen-18 and hydrogen-2. Oxygen-18 is eliminated from the body in water, while hydrogen-2 is eliminated in water as well as in carbon dioxide that is produced during energy expenditure. So accurate readings of daily energy expenditure was obtained by measuring levels of water and carbon dioxide leaving the body.

Manini said, "The technique has been around for use in humans for 20 years. "It is kind of expensive for a large-scale study, and also requires special expertise."

Study of the participants for a period of six years revealed that death rates went down as daily energy expenditure went up. In fact, it was found that seniors in the highest third of daily energy expenditure had a 69 percent lower risk of death than those in the lowest third.

As Manini said, "The study doesn't tell you what the people did -- just the quantity of energy expended". The method of energy expenditure was not taken in
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