I remember when I was pregnant (just 12 weeks ago), I was constantly questioned, “You mean you still workout when your pregnant?”  Darn right!  Not only did I workout because it kept my body in good shape, I also realized that it helped my body too.  Exercising throughout your pregnancy will help to reduce swelling (edema), and will keep your muscles strong in preparation for delivering your baby, plus it will help to keep your body at a healthy weight, and make it easier to get back to your body before baby.  Just remember, check with your doctor when you get pregnant prior to starting or continuing your exercising program.