One of the questions I am asked often is what, if any, exercise can be done during pregnancy. In the absence of either medical or obstetric complications, the recommendation is similar to that of the non pregnant state. Thirty minutes or more of moderate exercise should occur 3-4 times a week. Due to the changes associated with pregnancy, pregnant woman should avoid supine (lying on one's back) positions during exercise as well as motionless standing for prolonged periods of time. Activities (i.e. ice hockey, gymnastics, skiing, horseback riding) which have a risk of contact or falling should be avoided. There are certain conditions which preclude exercise during pregnancy.