Exercise during pregnancy has been shown to relieve back pain, lower a mother's blood pressure and improve mood, according to a new study. The study complements the growing research on the impact of pregnancy on women's health and wellbeing.

You may think you should just take it easy and exercise less during pregnancy to prevent you from harming your unborn child. Most types of exercise, including running, strength training and swimming, are safe in healthy women during pregnancy. However, some types of exercise can harm your baby.