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  3. Some people say that the best way to reduce the body’s mid-section is to do stomach exercise. Many people believe that when spec

Some people say that the best way to reduce the body’s mid-section is to do stomach exercise. Many people believe that when spec

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问题      Some people say that the best way to reduce the body’s mid-section is to do stomach exercise. Many people believe that when specific muscles are exercised, the fatty tissues in the immediate area are "burned up". The truth is that exercise burns fat from all over the body and not from one specific area, no matter what kind of exercise.  Of course, if you reduce the fat throughout your body, you will certainly see results around your waist too.
    It is said that you need to exercise only twice a week in order to keep a sufficient level of physical fitness. Studies conducted by American scientists show that unexercised muscles lose their strength very quickly. After 48 to 72 hours, you must use the muscles again to reestablish the good physical effects. And what does that mean to you? American scientists concluded that while daily exercise is most helpful, every other day, three days a week will keep a sufficient level of physical fitness.
    Is it true that you burn more calories running one mile than walking the same distance? The answer is no. The truth is that you use the same amount of energy whether you walk or run the mile, since in both cases you are moving the same weight the same distance. The speed does not matter. Of course, if you run rather than walk for 30 minutes, you will cover more distance, and therefore burn more calories.
    If your breathing doesn’t return to normal within minutes after you finish exercising, you have exercised too much. Five minutes or so after exercising, your breathing should be normal, your heart shouldn’t be beating, and you shouldn’t be exhausted.
According to the text, a proper way to keep a sufficient level of physical fitness is that you need to ______.
选项 A、exercise any half of the week
B、exercise any two days of the week
C、exercise every other day, three days a week
D、exercise three days a week at most
答案C
解析 本题为细节判断题。第二段最后一句指出了一个有别于大多数人所持的“一周两次”的观点，即科学家认为每天进行锻炼固然最好，但隔天一次，也就是说一周三次锻炼就可以确保我们的身体健康了。
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