TUESDAY, Feb. 21 (HealthDay News) -- Exercising at moderate or -- for very active women -- even high intensity during pregnancy won't hurt your baby's health, a new study finds.
Researchers monitored healthy women in their third trimester before and after 30 minutes on a treadmill and found no problems with measures of fetal well-being, including heart rate and blood flow. The results were similar whether or not the women exercised on a regular basis.
"Healthy pregnant women who exercise should be encouraged to continue, and if a woman is pregnant and is not an exerciser, she should be encouraged to start a moderate exercise program," said study co-author Dr. Linda Szymanski, an assistant professor in the division of maternal-fetal medicine at Johns Hopkins University in Baltimore.
The findings are in line with the recommendation of the U.S. Department of Health and Human Services that healthy pregnant women get at least two and a half hours of medium-intensity aerobic exercise a week even if they did not exercise before becoming pregnant. Exercise improves heart health and may reduce the risk of complications during pregnancy, such as developing high blood pressure and diabetes.
However, research indicates that women tend to exercise less when pregnant, and most fall short of the government guidelines.


