The physiological changes during pregnancy and when women can start exercising:
**Pregnancy causes many physiological changes in a woman's body to support fetal growth. These changes include the cardiovascular, respiratory, hormonal systems, and more. I will highlight the most important of these changes, then discuss when and how pregnant women can safely exercise.** ### **Physiological Changes During Pregnancy:** 1. **Cardiovascular System:** - **Increased Blood Volume:** Total blood volume increases by about 30-50% during pregnancy to meet the needs of the mother and fetus. - **Increased Heart Rate:** The heart rate rises by about 10-20 beats per minute to pump more blood. - **Decreased Blood Pressure:** Blood pressure may decrease slightly, especially in the first trimester, due to vasodilation. 2. **Respiratory System:** - **Increased Oxygen Demand:** Oxygen consumption increases by up to 20% to support fetal growth. - **Diaphragm Expansion:** Due to increased pressure from the growing uter...