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  3. School-age children should participate in 60 minutes or more of moderate to vigorous physical activity daily, according to an ex

School-age children should participate in 60 minutes or more of moderate to vigorous physical activity daily, according to an ex

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问题     School-age children should participate in 60 minutes or more of moderate to vigorous physical activity daily, according to an expert panel. "The take-home message for parents is that it is very important to ensure that their children spend at least an hour a day in some form of appropriate physical activity," says Dr. William B. Strong, a pediatric cardiologist and retired professor at the Medical College of Georgia who co-chaired the panel.
    "The important thing is we have to get American children and adolescents active," says co-chair Dr. Robert M. Malina, research professor and an expert in growth and development at Tarleton State University in Stephenville, Texas. "The evidence is very clear that physical activity has decreased dramatically in the last 10 to 20 years," Dr. Malina says as the technology revolution of the 1980s produced more sedentary options for children while their caloric intake has essentially remained the same.
    "Our children are just not burning up those calories today," Dr. Malina says of the obesity epidemic in children. "All of us need to help children increase the amount of time spent in moderate to vigorous physical activity. This means that parents, coaches, teachers and others who influence youngsters need to become active role models and get children involved with regular participation in physical activity."
    "Increasing the level of habitual moderate to vigorous intensity physical activity in youth is a health promotion and a disease prevention strategy," the panelists conclude. Restoration of physical education and other school—and community—based programs could contribute mightily to that strategy, they say.
    Recommendations of the 13-member panel are published in the June issue of The Journal of Pediatrics. Panelists were convened by the Constella Group, Inc., a professional health services company headquartered in Durham, N.C., contracted by the Divisions of Nutrition and Physical Activity and Adolescent and School Health of the Centers for Disease Control and Prevention.
    "We were asked to review the literature and find evidence of the impact of physical activity on the health and well-being of children and to make recommendations based on the evidence, not just on what we all believe to be beneficial," says Dr. Strong, Charbonnier Professor Emeritus at MCG and founding director of MCG’s Georgia Prevention Institute, where researchers are exploring issues such as the impact of activity on children’s weight and cardiovascular health.
According to Dr. Malina, the decrease in physical activity amongst young Americans is mainly due to______.
选项 A、a lack of physical education
B、an unhealthy diet
C、a lack of opportunities for physical exercise
D、the fact there are more opportunities for them not to exercise
答案D
解析 属细节题。A项文中没有提到缺乏体育课是体育活动减少的原因。B是导致肥胖的原因。根据第二段第二句，玛丽娜博士说，在过去的10至20年中，有迹象清楚地表明孩子们体育活动的时间明显下降，20世纪80年代的技术革命为孩子们提供了更多久坐不动的机会……，故D为正确答案。C项不是根本原因。
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