Page 4 - Exercise.pdf
P. 4

found the reverse.                                          reduction in early mortality, compared with
                                                                people who never broke much of a sweat.

                                                                The researchers did not note any increase
                                                                in mortality, even among those few people
                                                                completing the largest amounts of intense
                                                                exercise.

                                                                Of course, these studies relied on people's

                                                                shaky recall of exercise habits and were
                                                                not randomized experiments, so can't
                                                                prove that any exercise dose caused
                                                                changes in mortality risk, only that
                                                                exercise and death risks were associated.
    For this study, Australian researchers
    closely examined health survey data for                     Still, the associations were strong and

    more than 200,000 Australian adults,                        consistent and the takeaway message
    determining how much time each person                       seems straightforward, according to the
    spent exercising and how much of that                       researchers.
    exercise qualified as vigorous, such as
    running instead of walking, or playing                      Anyone who is physically capable of
    competitive singles tennis versus a                         activity should try to “reach at least 150
    sociable doubles game.                                      minutes of physical activity per week and
                                                                have around 20 to 30 minutes of that be
    Then, as with the other study, they                         vigorous activity,” says Klaus Gebel, a
    checked death statistics. And as in the                     senior research fellow at James Cook
    other study, they found that meeting the                    University in Cairns, Australia, who led the
    exercise guidelines substantially reduced                   second study. And a larger dose, for those
    the risk of early death, even if someone's                  who are so inclined, does not seem to be
    exercise was moderate, such as walking.                     unsafe, he said.


    But if someone engaged in even
    occasional vigorous exercise, he or she
    gained a small but not unimportant                                          Girish Sharma,
    additional reduction in mortality. Those                                         MD, FACC
    who spent up to 30 percent of their weekly
    exercise time in vigorous activities were 9                 Girish Sharma is a cardiologist, whose

    percent less likely to die prematurely than                 practicing cardiology and internal
    people who exercised for the same                           medicine. He is a speaker for various
    amount of time but always moderately,                       medical subjects. He is well known for
    while those who spent more than 30                          making tough medical subjects easy to
    percent of their exercise time in strenuous                 understand equally well by the medical
    activities gained an extra 13 percent                       professionals well as general audience.



   P.G. Better Living
   1   2   3   4