大学英语六级阅读训练及答案(三)_大学英语阅读

大学英语六级阅读训练及答案(三)

　　than the unfit dieter when it comes to hiking, furniture moving, even making love.

　　Regular exercise helps to raise blood levels of high-density lipoprotein , the good cholesterol that may work to prevent coronary heart disease, while it reduces levels of low-density lipoprotein , the bad cholesterol. Since the results of a ten-year study on 3806 middle-aged men were announced in January 1984 by the National Heart, Lung, and Blood Institute, we can say that lowering LDL levels will definitely reduce the number of heart attacks and save lives.

　　Exercise also slow mineral loss from bones, and improves ones mental outlook. A study of 17,000 Harvard alumni from 1962 to 1978 provided the first substantial evidence that physical activity maintained through adulthood leads to longer life.

　　The benefits of eating more because of an increase in physical activity are not widely appreciated. Many people in this country, by actual measurement, have remarkably low calorie intake. Often the amount is so low that nutritionists worry about the adequacy of their vitamin and mineral intake. And too little food, with inadequate fiber content, leads in the older sedentary population to chronic constipation.

　　Increased exercise leads to increased food intake and thus to increased intake of critical nutrients. So robust eating is no sin. It is the way we were designed to function, the complement to an active life-style.