The benefits of exercise for diabetic, both Type 1 and 2, are described in an article by the Mayo Clinic.

Besides boosting your mood and energy levels, exercise leads to:

• Improved blood sugar control. When you exercise, your muscles use sugar (glucose) for energy. This reduces your blood sugar. The more strenuous your workout, the longer the effect lasts. And there's more. If you have type 2 diabetes, exercise can increase your insulin sensitivity. That means your body requires less insulin to escort sugar into your cells. Along with a healthy-eating plan, exercise may even reduce — or eliminate — your need for glucose-lowering medication.