【英语时差8,16】运动的另一个原因
时间：2015-12-18 05:09:07
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（单词翻译）
We've all heard many reasons to exercise, but in this Moment of Science Don tells Yael about what might be a new one to most of us. D: (In the background, Don is breathless doing jumping
jacks1 and counting).
Y: Don--Don, we're on the air--D: (BREATHLESS) Sorry, Yael, just getting in some jumping jacks before work. I don't want to be one of the quarter million Americans who die
prematurely2 each year from conditions like
diabetes3, heart disease, and
obesity4.
Y: Oh brother, another segment about the benefits of exercise. What's the big deal? Isn't there medicine that takes care of these diseases?
D: Well, medication is great for
stabilizing5 existing conditions, but it doesn't solve the
underlying6 problems--Y: (BORED)--and everybody knows that exercising is good for you.
D: Yes, but now scientists suggest that exercise is even more than that. The theory is that humans are
genetically7 programmed by evolution to be
physically8 active. After all, our ancestors spent millions of years hunting and
gathering9 and only the last few thousand years as cultivators.
Y: So cushy office jobs aren't natural?
D: Right. So today, when we think of the average person, we think of someone who doesn't exercise. And what these scientists are saying is that the biological norm is a person who is very active.
Y: I'm not sure I see your point.
D: So instead of saying that exercising decreases your risk for certain health problems, it's more correct to say that not exercising increases your risk for those problems. Your body expects you to exercise, and when you don't, your body is more likely to break down. So when you do nothing, you're actually making things worse.
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