Physical activity during pregnancy can benefit both you and your baby by lessening discomfort and fatigue, providing a sense of well-being, and increasing the likelihood of early recovery after delivery. Light to moderate exercise during pregnancy strengthens the abdominal and back muscles, which help to improve posture. Practicing yoga, walking, swimming, and cycling on a stationary bicycle are usually safe exercises for pregnant women. But ALWAYS check with your doctor before beginning any kind of exercise, especially during pregnancy.
Information courtesy of the Centers for Disease Control and Prevention