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Abstract
Recent definitions of the metabolic syndrome from the World Health Organization (WHO) and National Cholesterol Education Program (NCEP) have given us a clearer picture of the prevalence of the metabolic syndrome and the risks it poses for cardiovascular disease and type 2 diabetes. Solid epidemiological and trial evidence support lifestyle changes as the main modifiable risk factors, including abdominal obesity, sedentary lifestyle and a diet rich in saturated fat and low in fiber content, in the treatment of individual components of the metabolic syndrome. Physical activity may prevent the metabolic syndrome as defined by the WHO and NCEP, but the evidence for lifestyle changes using these definitions is still sparse. No trials on the treatment of the metabolic syndrome to prevent diabetes have been published. However, both the Finnish Diabetes Prevention Study and the Diabetes Prevention Program found that moderate lifestyle interventions in persons with impaired glucose tolerance, a condition related to the metabolic syndrome, decreased the incidence of type 2 diabetes by 58%. Some drugs may also prevent diabetes. Further research on lifestyle modifications in the prevention and treatment of the metabolic syndrome, and on how best to promote lifestyle changes, is needed. In the meantime, efforts to curb obesity and overweight, increase physical activity and improve compliance with current dietary recommendations should continue.