If the intention is to try and lose some weight whilst exercising and enjoying yourself then obviously some of these practices are better than others. If by burning up calories you are having to replace them with carbohydrate then this won’t help with weight loss. It is probably best to try using the adjusting bolus insulin method.
This way you have to plan for exercise to be about 2 hours after a meal and cut down the amount of insulin you take with that meal according to the amount of exercise you are going to do. The next best approach would be the combination method but try to use as much of the bolus adjustment approach rather than having to replace the carbohydrate.
Our aim at Excarbs.com is to help people with diabetes using insulin to feel comfortable with taking up exercise – our advice is not aimed at elite athletes but hopefully covers the basic rules for most people living with diabetes.
Remember that if exercise is sustained you will become much more sensitive to the effect of insulin and the dose needed will fall which is a really good result!