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大学英语四级题库/阅读理解 Section C

    I exercise all the time, but I still have gut fat that hangs over my belt when I sit. Why isn't all the exercise getting rid of it?
It's a question many of us could ask. More than 45 million Americans now belong to a health club. We spend some $19 billion a year on gym memberships. Of course, some people join and never go.Still, as one major study -- the Minnesota Heart Survey -- found, more of us at least say we exercise regularly.
    And yet obesity (肥胖) figures have risen sharply in the same period: a third of Americans are obese, and another third count as overweight by the Federal Government's definition. Yes, it's entirely possible that those of us who regularly go to the gym would weigh even more if we exercised less. But like many other people, I get hungry after I exercise, so I often eat more on the days I work out than on the days I don't.Could exercise actually be keeping me from losing weight?
    The popular belief that exercise is essential for weight control is actually fairly new. As recently as the 1960s,doctors routinely advised against too much exercise, particularly for older adults who could injure themselves. Today doctors encourage even their oldest patients to exercise, which is sound advice for many reasons: People who regularly exercise are at significantly lower risk for all manner of diseases-- those of the heart in particular. But the past few years of obesity research show that the role of exercise in weight loss has been wildly over-evaluated. 
    "In general, for weight loss, exercise is pretty useless," says Eric Ravussin,exercise researcher at Louisiana State University. Many recent studies have found that exercise isn't as important in helping people lose weight as you hear so regularly in gym advertisements or from magazines.
The basic problem is that while it's true that exercise bums calories and that you must burn calories to lose weight,exercise has another effect: it can make one hungry. That causes us to eat more,which in turn can negate (使无效) the weight-loss benefits we just gained. Exercise, in other words,isn't necessarily helping us lose weight. It may even be making it harder.

1.[单选题]What is the passage mainly about?
  • A.The benefits that older adults can get from exercises.
  • B.The relationship between exercises and weight loss.
  • C.The role that exercises play in American's life.
  • D.The popularity of obesity in today's America.
2.[单选题]What can we learn from the second paragraph?
  • A.Some Americans join a health club but never go there.
  • B.People tend to lie about the time they spend on exercise.
  • C.More than 45 million Americans now go to the gym regularly.
  • D.Americans waste too much money each year on sports.
3.[单选题]Why do today's doctors change their attitude toward exercise?
  • A.Exercise can build up good figures for people.
  • B.Exercise has great effect on weight loss.
  • C.Exercise may injure older people in particular.
  • D.Exercise can lower the risk of many diseases.
4.[单选题]People might gain weight when doing exercises because________
  • A.they have the habit of going to the gym regularly
  • B.they eat the same food when they do not exercise
  • C.they exercise less than required by doctors
  • D.they eat much more after doing exercises
5.[单选题]According to the past few years of obesity research, exercise________
  • A.has long been believed to be good for older adults
  • B.is properly not an effective way to lose weight
  • C.was recognized as a way to lose weight in the 1960s
  • D.is not effective in preventing heart disease
参考答案: B,A,D,D,B
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