According to the Updated Guidelines from the American College of Sports Medicine (ACSM) and American Heart Association (AHA), pregnant women should exercise on at least 3 (and preferably all) days of the week, at an intensity of 40%-60% HRR (click here to calculate yours), for at least 15-30 minutes per day for a total of 150 minutes a week.
That's 2 Stroller Strides classes a week ...
So, to all you expecting mothers at class, keep it up! I hear so many stories of women who did not exercise during their first pregnancy but started during their second, and they can all vouch for what a difference exercise made to their labor, delivery, and recovery.