**4.2 Insulin guidelines**

It is often necessary to regulate insulin dosage to prevent hypoglycemia. This occurs most often with moderate to energetic activity lasting more than 45 to 60 minutes. For most persons, a modest decrease (of about 1 to 2 units) in the rapid- (or short-) acting insulin during the period of exercise is a suitable starting point. For lengthy vigorous exercise, a larger decrease in the total daily insulin dosage may be essential. After exercise, insulin dosing also may have to be reduced [1].
