There is now unequivocal evidence that physically fit people are less likely to develop Type 2 diabetes and some intervention trials have shown that encouraging people with impaired glucose tolerance (IGT) to increase their physical activity significantly reduces their risk of developing diabetes (14-16). This benefit is independent of body mass index (BMI) and there is some evidence that physical activity has a greater protective effect as BMI increases (17). It may be of more importance for people at risk of Type 2 diabetes to increase their physical fitness rather than concentrate on weight reduction.
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