12.Does regular exercise help to prevent type 2 diabetes?
Yes, regular exercise of at least moderate intensity provides some protection against the onset of type 2 diabetes. Exercise improves insulin resistance and thereby makes insulin more effective at removing glucose from the blood.
In patients with prediabetes (see Question 9), exercise can prevent the progression of elevated glucose values toward the frankly diabetic range, or even restore them to normal. Exercise also consumes calories from those stored in the exercising muscle as starch (glycogen) and the need to replenish these stores draws glucose out of the bloodstream and thereby reduces the circulating levels.