Swimming is a great and enjoyable way to exercise during the hot months of summer. Swimming tones your entire body, and also is an excellent cardiovascular workout. It's a relaxing exercise that almost anyone can do, including people for whom jarring, weight-bearing activities are out of the question. It's wonderful for pregnant women in particular since swimming builds up abdominal and shoulder muscles. Water exercise can also reduce the joint stiffness, high blood pressure, and discomfort associated with pregnancy.