It is extremely important for your body to be sensitive to insulin. If your body is sensitive to insulin it has no problem processing carbohydrates for energy. If your body is not sensitive to insulin, those carbohydrates are going to turn into excess body fat.
So how do we stay sensitive to insulin? Stay active. Walk for at least twenty to thirty minutes a day. Engage in weight lifting / strength training. Stay active and your body will stay sensitive to insulin.
For more information on the importance of insulin sensitivity check out this article on Bodybuilding.com Insulin Sensitivity: Why You Can’t blast That Fat For Good