Copied from an article on the ModernMedicine Network site. (I am finding lots of interesting videos and articles on this site. To view the one I quote below you have to subscribe, but it costs nothing.) "Thwarting the progression to diabetes Weight loss and increased physical activity can prevent or delay diabetes by overcoming insulin resistance. Diet and exercise are more effective in preventing diabetes than are glucose-lowering drugs. Benefits of exercise Physical activity seems to confer a protective effect against diabetes independent of obesity or body fat percentage. This effect can be seen among the Old Order Amish, whose typical diet and rate of obesity do not differ from those of typical Americans but whose rate of diabetes is about 50% less. Although the percentage of Amish with prediabetes is about the same as other Caucasians in the United States, not as many Amish go on to develop diabetes, presumably because they lead a more active life."