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- <text id=89TT2951>
- <title>
- Nov. 13, 1989: Take A Walk--And Live
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1989
- Nov. 13, 1989 Arsenio Hall
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- HEALTH, Page 90
- Take a Walk -- and Live
- </hdr><body>
- <p>A new study says even mild exercise can postpone death
- </p>
- <p> Couch potatoes, your last excuse is gone. You knew you
- should be getting into your running shoes and hitting the
- pavement. After all, everyone concedes that exercising is one
- of the best ways to stave off heart attacks and other health
- problems. But hard physical exertion is downright unpleasant,
- and you -- along with about 50 million other sedentary Americans
- -- could be forgiven for putting it off or avoiding it
- altogether.
- </p>
- <p> No more, though. A study published last week in the Journal
- of the American Medical Association says that even a minimal
- amount of exercise -- a brisk half-hour walk once a day is
- enough -- confers significant protection not only from
- cardiovascular disease and cancers but also against death from
- a wide range of other causes. Put plainly, people who exercise
- just a little bit tend to live longer.
- </p>
- <p> The eight-year, 13,344-subject study, carried out by
- researchers at the Institute for Aerobics Research in Dallas,
- is hardly the first to establish a link between moderate
- exercise and longevity. But it is considered especially
- significant. For one thing, it includes both men and women, in
- contrast to earlier, mostly male surveys. For another, it
- strengthens the evidence that exercise can ward off cancer, a
- relationship discovered only in the past few years. And, perhaps
- most important, it is one of the largest studies ever done that
- relied on an objective measure of fitness, not just
- participants' descriptions of how much they exercise.
- </p>
- <p> The researchers measured fitness in a straightforward way:
- they put people on a treadmill, set them walking, and
- periodically increased first the incline and then the speed of
- the treadmill until the walkers could no longer continue. The
- subjects were grouped into five different fitness levels based
- on their performance and followed for the next eight years.
- </p>
- <p> At the end of that time, 283 of the participants, all of
- whom were in good health at the start of the study, had died.
- And after allowing for various other health-affecting factors,
- including smoking, age, cholesterol levels, weight, blood
- pressure and family history of heart disease, they found that
- deaths were sharply higher in the least-fit category than in the
- second-most-sedentary group -- more than double for men and
- almost twice as high for women.
- </p>
- <p> In the most-fit groups, which included people in the habit
- of running up to 40 miles a week, death rates tended to be
- lower still, but the improvement was not so dramatic. In short,
- says Carl Caspersen, a physical-activity epidemiologist at the
- federal Centers for Disease Control in Atlanta: "You don't have
- to be a marathoner to greatly reduce your mortality. After that
- first jump in activity, you're not buying that much more reduced
- risk."
- </p>
- <p> While this and earlier studies agree on the health benefits
- of regular, moderate exercise, no one is sure of the
- physiological mechanisms involved. It may be that exercise
- increases coronary blood flow, decreases clotting or both, which
- would limit the blood-vessel blockages that cause cardiovascular
- problems. And some scientists speculate that exercise increases
- bowel motility, a factor in avoiding colon cancer. Those
- questions may be answered in part by the next phase of the
- investigation, which is expected to include more than 40,000
- people. Such speculations are literally academic, though. For
- the average man or woman, the message is clear: get moving.
- </p>
-
- </body></article>
- </text>
-
-