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Activity level and cardiovascular risk

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The increasing prevalence of childhood obesity is predicted to result in increased cardiovascular risk. Children should eat less and engage in more physical activity, or so the common dictum goes. But how much physical activity should they engage in? An early (1988) recommendation by the American College of Sports Medicine was that children and adolescents should have 20–30 minutes of vigorous exercise a day. In 1998 the UK Health Education Authority suggested one hour …

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