BOB DOUGHTY: This is the VOA Special English program SCIENCE IN THE NEWS. I’m Bob Doughty.
SHIRLEY GRIFFITH: And I’m Shirley Griffith. Today, we will tell why exercise is so important. And we will tell about some popular ways to get in good shape.
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BOB DOUGHTY: Health experts have long noted the importance of physical activity. Exercise not only improves your appearance. It can also improve your health. Exercise helps to reduce the risk of some diseases. They include heart disease, stroke, type-two diabetes, osteoporosis and even some kinds of cancer.
America’s Centers for Disease Control and Prevention says （应该是/e/的音）heart disease is the leading cause of death in the United States. In two thousand six, heart disease killed more than six hundred thirty thousand Americans.（音节miss掉了） High blood pressure and high cholesterol levels in blood can increase your risk of heart disease. Medical experts say both can be reduced through normal exercise.
