【GMAT考满分逻辑CR题库】It is generally believed that people need to en_真题_答案

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It is generally believed that people need to engage in regular and strenuous physical exercise in order to maintain their physical health. Actually, however, low-impact walking—that is, walking at a normal pace, which elevates the heart rate and releases many of the hormones released in more strenuous exercise—is enough. This is evidenced by the strong correlation between the amount of time spent walking and measures of general physical health demonstrated by many studies.

Which of the following, if true, most seriously weakens the force of the evidence cited?

A
Most doctors advise that people begin more strenuous and intense physical exercises if they wish to improve their conditioning.
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B
People who already perform strenuous physical exercises also tend to walk more than people who do not.
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C
People who are fond of strenuous physical exercise also tend to be fond of walking.
分析该选项
D
The studies mentioned did not gather their own data but summarized data collected from other studies.
分析该选项
E
The physical activities described as “strenuous” varied wildly between studies.
分析该选项

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正确答案: B

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