Another great exercise to do when you are pregnant are ball exercises. “Pregnancy ball exercises can help engage your core and improve hip stability.” The following link has 9 Pregnancy Ball Exercises for Expecting Moms. Balance balls or exercise balls are pretty inexpensive (around $15-$20) and can be purchased at a variety of stores that sell other exercise equipment. It’s a safe and fun way to stay active and fit during pregnancy while working out!! Make sure you check with your doctor before you start any exercise plan.