Gentle exercise (such as walking) can generally be started as soon as comfortable after giving birth. Start when you feel up to it. Some women will feel able to start exercising early. Six weeks after giving birth, most of the changes that occur during pregnancy will have returned to normal. If you had a caesarean birth, a difficult birth, or complications, it may take a little longer to feel ready to start exercising. If you did not exercise during pregnancy, start with easy exercises and slowly build up to harder ones. Keep in mind your lower back and core abdominal muscles are weaker than they used to be. Your ligaments and joints are also more supple and pliable, so it is easier to injure yourself by stretching or twisting too much. Avoid any high-impact exercises or sports that require rapid direction changes.