Pregnancy is a time of celebration, love, and unwanted but necessary weight gain. However, being pregnant doesn’t mean that your health and figure has to suffer permanent damage. You can gain weight in a healthy fashion while doing some very easy and safe heart healthy pregnancy exercise routines. One of the simplest and most effective pregnancy exercises you can do is walking. Not only is walking one of the best cardiovascular exercises, it is also one of the safest pregnancy exercises you ca.