The liver pours out glucose for the muscles to use as energy. Glucose stays in the bloodstream when it does not get used, which can lead to diabetes.
No one wants to have any disease, so if you are able to prevent getting one why wouldn't you. However you don't get diabetes from not only exercising, it can be heredetery. If you are active and keep your weight down this can help it not become active. Reflexology can help with you being able to lower the doseage of your medication, insulin. And Reiki can assist with you relaxing and keeping your body flowing smoothly with no agitation.