Insulin resistance menas the body does not properly use the insulin that it makes, thus causing blood sugar to go too high. Weight loss can improve insulin resistance, and therefore improve blood sugar control. Exercise has a similar benefit in improving insulin resistance. Weight loss and exercise are the cornerstone to treating type 2 diabetes. I have type 2 diabetes and control my blood sugar with diet and exercise.
Exercise does burn glucose from the blood and can lower the blood sugar.
Many people exercise to help with weight loss. If extra snacks are eaten, fuel from the snack will fuel the exercise. As a result, the effort to lower blood sugar and burn fat for fuel will be less effective. If you have high blood pressure you may need medication to control it. Not all exercises or diets are suitable for everyone.