Of course you should check with your doctor, but many studies have shown that exercise is not harmful during pregnancy. Some have concluded that women who exercise vigorously during pregnancy give birth to smaller but otherwise healthy babies, and one study showed that vigorous exercise during pregnancy can help to prevent preterm birth.

Marathon runner Ingrid Christianson, a former world record holder, gave birth to a healthy baby after winning the Houston Marathon when she was five months pregnant. Sharon Wood climbed Mt. Everest while she was pregnant.

It would be almost impossible for a pregnant women to exercise so vigorously for the baby