Final answer:
It is true that women who engage in regular exercise before becoming pregnant tend to gain less weight during pregnancy. Such exercise routines contribute to a healthier initial weight and a more controlled weight gain while pregnant, considering the necessary additional calories during the later stages of pregnancy.
Step-by-step explanation:
Women who exercise before pregnancy tend to gain less weight during pregnancy is generally true. Exercising prior to pregnancy can lead to better overall fitness, which may help to regulate weight gain during pregnancy. However, it's important to understand that weight gain during pregnancy is a natural and essential process, as it accommodates the growing fetus, enlarged uterus, and increased blood volume. Notably, exercise habits may contribute to an initial lower body weight and more regulated weight gain during the pregnancy.
It is essential for pregnant women to follow appropriate guidelines for weight gain during pregnancy, which usually includes not needing additional calories during the first trimester but requiring an extra 300 calories per day during the second and third trimesters. Despite some beliefs, the idea that a pregnant woman needs to eat for two and double her caloric intake is a myth. The goal is to support the pregnancy with necessary nutrients without excessive caloric intake.
Pregnancy-related weight gain primarily occurs in the breasts and abdominal region and can be accompanied by symptoms such as nausea and heartburn. Pregnancy weight gain also includes an increase in blood volume and changes in skin conditions, such as the development of stretch marks.