英语短文运动不要太难,初一水平的.

英语短文运动
不要太难,初一水平的.

Exercise Benefits Your Health（运动益身）
Moderate exercise,such as walking,can reduce the risk of diabetes in obese and sedentary people whose blood sugar is starting to rise.That outcome was shown in a large federal study in which participants were randomly assigned either to an exercise and diet program,to take a diabetes drug or to serve as controls.Despite trying hard,those who dieted and worked out lost very little weight.But they did manage to maintain a regular walking program,and fewer of them went on to develop Diabetes.
Exercise also may reduce the risk of heart disease,though the evidence is surprisingly mixed.There seems to be a threshold effect:Most of the heart protection appears to be realized by people who go from being sedentary to being moderately active,usually by walking regularly.More intense exercise has been shown to provide only slightly greater benefits.Yet the data from several large studies have not always been clear,because those who exercise tend to be very different from those who do not.
Active people are much less likely to smoke; they’re thinner and they eat differently than their sedentary peers.They also tend to be more educated,and education is one of the strongest predictors of good health in general and a longer life.As a result,it is impossible to know with confidence whether exercise prevents heart disease or whether people who are less likely to get heart disease are also more likely to be exercising.（如果你觉得长,可以把这最后一段略去.）