- Bleeding from your vagina
- Difficult or labored breathing before you exercise
- Dizziness
- Headache
- Chest pains
- Muscle weakness
- Calf pain or swelling
- Preterm labor
- Decreased movement of the fetus
- Leakage of fluid from your vagina
Source: American College of Obstetricians and Gynecologists. Exercise during pregnancy and the postpartum period. Obstetrics & Gynecology, volume 99, number 1, January 2002, pages 171-173.






