Walking is an ideal activity during pregnancy because it doesn't stress your body in any unfamiliar way. And it's the one form of exercise most women can safely do right up to the end of your pregnancy unless your doctor has ordered bed rest or otherwise has restricted your activity. In fact, the latest research shows that regular exercise is not only safe for pregnant women—it may actually enhance their experience. While the effects of exercise on pregnancy have been studied only in the last decade or so, results consistently show that women who stay fit during pregnancy, even with a casual walking program, may require less medical intervention during both pregnancy and childbirth.

Less scientific, but just as important, exercise makes pregnant women feel better. Many women say that exercise reduces the aches and pains associated with pregnancy and boosts their energy levels and self-esteem.