Although women are often advised to exercise during pregnancy and after birth, there is little information available about the tremendous benefits of physical activity for both mother and baby, or what kinds of exercise are safe and appropriate. In Why Pregnancy and Postnatal Exercise Matters, Rehana Jawadwala, a sports physiologist and perinatal yoga teacher, looks at the evidence for supporting physical activity in mothers, as well as how women's physiology changes during pregnancy and after they give birth, answering in detail the questions that mothers and those supporting them may have.