Why is cardiovascular fitness important?

it muscles become stronger.

it flexibility.

it one to lift heavier weights.

it the heart, lungs, and circulatory systems to work well.

It helps the heart, lungs, and circulatory systems to work well

Explanation:  As a result of constant exercise of an individual it helps the heart (Cardiovascular)pump blood as well as help lower blood pressure, and keep your arteries clear by raising “good” high-density lipoprotein (HDL) cholesterol and lowering “bad” low-density lipoprotein (LDL) cholesterol levels in the blood.

a mother eats twice as much to support her growing fetus

limiting sugar intake in a mother with gestational diabetes, switching from diving to swimming.   depending on whether the patient is normal weight, over weight or gain will differ depending on that.