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If you pluck someone off the street, whether in New York or Seattle or Sacramento, and askthem how many steps people should aim for per day in order to get enough physical activity, they'llprobably tell you l0000.
But is there any medical reason to embrace this number? Not really. That's because the10000-step-a-day recommendation has nothing to do with sedentary, fast-food-drenched circa-201 5America. Rather, the recommendation first popped up in a very different food and environment:1960s Japan.
"It basically started around the Tokyo Olympics in 1964," said Catrine Tudor-Locke, aprofessor who studies walking behavior at LSU's Pennington Biomedical Center. "A company overthere created a man-po-kei, a pedometer. And man stands for '10000', po stands for 'step', and keistands for 'meter' or 'gauge'." Whatever the reason for the adoption of this particular number, "It resonated with people at the time, and they went man-po-kei-ing all over the place," said Tudor-
Locke.
The problem, which barely needs stating, is that circa-1964 Japan was markedly different fromthe circa-2015 U.S. Data from the Food and Agriculture Organization of the United Nations showsthat the average per-capita food supply for Japanese people in 1964 was 2632 calories, while theaverage for Americans in 2011 was 3639. That's a difference of about 1000 calories-or, about20000 steps for an average-sized person.
More broadly, 10000 steps is just a bit too simplistic a figure, say nutrition researchers. All theones I spoke to agreed that there's nothing wrong with shooting for 10000 steps, and that walkingmore is better than walking less. But Tudor-Locke said that "The one-size-fits-all approach doesn't necessarily work."
"Focusing exclusively on how many steps you're getting and neglecting those other aspectsisn't going to lead to an overall improvement in health, unless you're addressing those other factorssimultaneously," said Jeff Goldsmith, a biostatistics professor at Columbia's Mailman School ofPublic Health.
Maybe it's time, given just how unhealthy so many people are and how much they'd benefitfrom moving around just a little more, to embrace an improvement approach to exercise. "Standrather than sit, walk rather than stand. jog rather than walk. and run rather than jog," wrote UlfEkelund, lead author of the European mortality study. in an email. Tudor-Locke concluded evenfurther: "Just move more than before," she said.
31. What do the first two paragraphs mainly tell us?
A. There is no evidence showing it is a must for us Americans to take 10000 steps a day.
B. To get enough physical activity, people should take 10000 steps a day.
C. The recommendation has something to do with Japan rather than America.
D. Any American will tell you it is necessary for us Americans to take 10000 steps a day.
32. What does the underlined expression "resonated with" (Para. 3) most probably mean?
A. Had link with.
B. Brought benefit to.
C. Became popular with.
D. Perfectly applied to.
33. Which of the following sentences is correct according to the passage?
A. Nowadays, a lot of people are unhealthy due to lack of exercise.
B. To improve overall health. we should exercise as much as possible.
C. It is better to take as many steps as your overall health condition can allow.
D. Walking more is better than walking less.

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