My own understanding is - when it comes to weight loss (as in shrinking those fat cells) - it's about the food (and drink), not exercise. I don't advocate eating less, but changing what you are eating, first and foremost for we diabetics - lowering the carbs. Then find out what suits you best in the ways of eating stakes. Exercise is excellent for general health and fitness, and muscles growth, but nothing is going to happen to your fat deposits unless you change what you are eating, ie - it's the food (and drink).
Of course, exercise also 'mops up' excess glucose by funnelling it into our muscles - so, good for us too, for that.