In the United States, 30 percent of the adult population has a weight problem. To many people, the cause is obvious: we eat too much. But scientific evidence does little to support this idea. Going back to the America of 1910, we find that people were leaner than today, yet they ate more food. In those days people worked hard physically, walked more, used machines much less, and didn’t watch television.
Several modern studies, moreover, have shown that fatter people do not eat more on the average than thinner people. In fact, some investigations, such as a 1979 study of 3,545 London office workers, report that, on balance, fat people eat less than slimmer people.
Studies show that slim people are more active than fat people. A study by a research group at Stanford University School of Medicine found the following interesting fact: The more the man ran, the greater loss of the body fat. The more they ran, the greater increase in food intake.
Thus, those who ran most ate most, yet lost the greatest amount of body fat.
1. What kind of physical problem do many adult Americans have?
A. They are too fat B. They work too hard
C. They are too slim D. They lose too much body fat
2. Based upon the statistics given in the article, suppose there are 5000 adult Americans, about how many of them will have a “weight problem”?
A. 1500 B. 1000 C. 1200 D. 1800
3. In comparison with the adult American population today, the Americans of 1910________.
A. ate less food but had more activities B. ate more food and had physical activities
C. ate less food and had less physical exercise D. had more weight problems
4. What have medical and scientific researches reported to us?
A. Thin people run less, but have greater increase in food intake,
B. Fat people eat more food than slim people and are more active.
C. Fat people eat more food than slim people but are less active.
D. Fat people eat less food and are less active.