There are three main things to consider when gauging the appropriateness of prenatal exercise. For starters, are there any pregnancy complications or known contraindications to/ precautions for exercising while pregnant? These are things your birth professionals should have diagnosed and explained such as preeclampsia, placental defects, gestational diabetes, cervical insufficiency, etc. In these cases, the risk may dictate what intensity of exercise is recommended, or if may even outweigh the rewards associated with exercise altogether.