The exact opposite is true: Exercise is a key component of any diabetes treatment plan, as it helps diabetics better use insulin and lower or maintain weight. Alas, exercise is often the most overlooked weapon in the arsenal against this disease, underestimated by both patients and care providers. If the person in your care hasn't been active in a long time, is overweight, or has other medical conditions or mobility issues, then it's wise to get his or her main diabetes care provider's green light before he or she embarks on an exercise regimen. But barring severe disability or serious complications, physical activity of some sort -- and this doesn't have to mean working out at a gym -- should be done regularly by everyone with diabetes, regardless of age. You might encourage the person you're caring for to take walks with you, for instance.