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    Walking Faster May Lead to a Longer Life

    Study Shows a Link Between Walking Speed and Life Span
    By
    WebMD Health News
    Reviewed by Laura J. Martin, MD

    Jan. 4, 2011 -- A swift stride puts you on the path to a longer, healthier life, researchers say.

    Scientists reporting in The Journal of the American Medical Association say that older adults who typically walk 1 meter per second or faster live longer than expected. A walking, or gait, speed of 1 meter per second is equal to 3.28 feet per second.

    Walking speed can be an important sign of someone's overall health. A slow walking speed may be due to multiple causes including heart, lung, or nervous system problems, or even joint pain. Several studies have suggested that a person with a walking speed slower than 0.6 meters per second (less than 2 feet per second) may be at increased risk for poor health and function.

    Stephanie Studenski, MD, MPH, of the University of Pittsburgh, analyzed the collective results of nine previous studies to determine if walking speed explained survival differences among older adults and whether it could be used to predict longevity.

    Study participants walked at their usual pace from a standing start, while researchers calculated distance in meters and time in seconds. The average age of the participants was 73.5; a majority were white women.

    Faster Pace Boosts Life Span

    The average walking speed for the study participants was 0.92 meters per second, or about 3 feet per second. A person's predicted life expectancy for each sex and age group increased the faster they could walk.

    The survival differences were especially notable among patients age 75 and older. The predicted 10-year survival rate varied greatly with walking speeds, from 19% to 87% in men and from 35% to 91% in women.

    “Gait speeds of 1.0 meter [3.28 feet]/second or higher consistently demonstrated survival that was longer than expected by age and sex alone. In this older adult population the relationship of gait speed with remaining years of life was consistent across age groups, but the absolute number of expected remaining years of life was larger at younger ages,” the researchers write.

    Calculating life expectancy based on walking speed, sex, and age was as accurate as predictions based on other factors, such as age, sex, overall health, mobility, hospitalization, and smoking history.

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