Diabetes is one of the most common chronic illnesses incurred by a disorder in insulin secretion and/or its activity. There are five basic principles of diabetes treatment: education, proper insulin therapy, proper nutrition, physical activity and self-monitoring of blood glucose. Physical activity significantly affects glucose regulation. A person suffering from diabetes must determine what type of physical activity is best suited for themselves. Whether it be anaerobic, aerobic, interval training or combined, it is important to exercise regularly. Each physical activity affects the glucose levels and the disease regulation differently. However, all types of physical activity lead to the reduction of the blood glucose levels, a decrease in insulin unit intake and a decrease in HbA1c levels (average quarterly blood glucose levels). Diabetes is said to be a 'silent killer'. Therefore, it is necessary to constantly emphasize the importance of education, nutrition, regular therapy, self-control and physical activity as this is the only way that can prevent blidness, organ failures, amputation of certain body parts, etc. Physical activity is an integral part of the diabetes treatment. It helps to maintain adequate blood glucose levels, improves the lipid system, and increases insulin sensitivity which over the time loses its effect and leads to insulin resistance. Moreover, exercise reduces the need for insulin because it amplifies glucose consumption. This study examines the importance of physical activity in regulation and monitoring of the diabetes, as well as its limitations and certain things that need changing while exercising. To carry out physical activity, a person suffering from diabetes must be educated in order to prevent complications that exercising can cause.