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  3. Running may be the single most effective exercise to increase life expectancy, according to a new review and analysis of past re

Running may be the single most effective exercise to increase life expectancy, according to a new review and analysis of past re

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问题     Running may be the single most effective exercise to increase life expectancy, according to a new review and analysis of past research about exercise and premature death. The new study found that, compared to non-runners, runners tended to live about three additional years, even if they run slowly or sporadically and smoke, drink or are overweight. No other form of exercise that researchers looked at showed comparable impacts on life span.
    The findings come as a follow-up to a study done three years ago, in which a group of distinguished exercise scientists scrutinized data from a large trove of medical and fitness tests conducted at the Cooper Institute in Dallas. That analysis found that as little as five minutes of daily running was associated with prolonged life spans.
    After that study was released, the researchers were inundated with queries from fellow scientists and the general public, says Duck-chul Lee, a professor of kinesiology at Iowa State University and co-author of the study. Some people asked if other activities, such as walking, were likely to be as beneficial as running for reducing mortality risks.
    High-mileage runners wondered if they could be doing too much, and if at some undefined number of miles or hours, running might become counterproductive and even contribute to premature mortality.
    And a few people questioned whether running really added materially to people’ s life spans. Could it be, they asked rather peevishly, that if in order to reduce your risk of dying by a year, you had to spend the equivalent of a year’s worth of time on the trails or track, producing no discernible net gain?
    So for the new study, which was published in March in Progress in Cardiovascular Disease, Lee and his colleagues set out to address those and related issues by reanalyzing data from the Cooper Institute and also examining results from a number of other large-scale recent studies looking into the associations between exercise and mortality.
    Over all, this new review reinforced the findings of the earlier research, the scientists determined. Cumulatively, the data indicated that running, whatever someone’s pace or mileage, dropped a person’s risk of premature death by almost 40%, a benefit that held true even when the researchers controlled for smoking, drinking and a history of health problems such as hypertension or obesity.
The analysis of the medical and fitness tests showed that________.
选项 A、daily running played an important role in prolonging life spans
B、five minutes’ daily running was totally enough in prolonging life spans
C、daily running could not reduce mortality risks
D、daily running might enhance people’ s sense of happiness
答案A
解析 细节题。根据题干关键词定位到文章第二段最后一句That analysis found that as little as five minutes of daily running was associated with prolonged life spans。A项意为“每天跑步在延长寿命方面扮演着重要角色”，其中played an important role是was associate with的同义替换，故正确。B项totally一词表述过于绝对，故错误。C项意为“每天跑步不能降低死亡风险”，其与文中第三段最后一句as beneficial as running for reducing mortality risks相悖，故错误。D项意为“每天跑步可以增强人们的幸福感”，在文中不能找到相关信息，属于无中生有。故本题选A。
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