How can i lose this stubbern belly fat?

Few suggestions...: Take control of your energy management system by controlling your energy intake and managing your Insulin pump. You do this by altering your food intake such that your energy spent is 500-1000 greater than energy consumed. Increasing energy output through exercise can help you achieve this. Over time you will lose weight and belly fat in the process. There is no way to spot reduce fat depots.

Spot fat loss does : Not occur naturally. By losing weight in general a certain amt will be abdominal fat. Eat healthfully ; be physically active. Calories burned must > calories consumed. To tighten ab's do crunches, reverse crunches, exercise ball crunches, pelvic thrusts, lying leg raises, side bridge ; “bicycling” exercise on your back. Get regular aerobic exercise.