专业八级改错练习 第74期

Exercise is one of the few factors with a positive role in long
term maintenance of body weight. Unfortunately, that message has
not gotten through to the average American, that would rather try __1__
switching to "light" beer and low-calorie bread than increase physical
exertion. The Centers for Disease Control, for example, found
that fewer than one-fourth of overweight adults were trying to shed __2__
pounds said they were combining exercise with their diet.
In rejecting exercise, some people may be discouraged too
much by calorie-expending charts; for example, one would have to __3__
briskly walk three miles just to work the 275 calories in one __4__
delicious Danish pastry. Even exercise professionals concede half a
point here. "Exercise in itself is a very tough way to lose weight," __5__
says York Onnen, the program director of the President's Council on __6__
Physical Fitness and Sports.
Therefore, exercise's supporting role in weight reduction is vital. __7__
A study at the Boston University Medical Center of overweight police
officers and other public employees confirmed that those who diet __8__
without exercise regained almost all their old weight, while those
who worked exercise into their daily routine maintained their new
weight.
If you decide to start walking one mile a day, the added exercise
could burn an extra 100 calories daily. In a year's time, assumed no __9__
increase in food takein, you could lose ten pounds. By increasing the __10__
distance of your walks gradually and making other dietary adjustments,
you may lose even more weight.