How much exercise can I do the week after a c-section?

None. Be content to get out of bed and ambulate as much as you can indoors for the first week after your c-section. You may resume exercise 6-12 weeks postpartum and gradually increase it to your baseline by 52 weeks postpartum. It is critically important that you not let your legs hang down for prolonged periods of time postpartum. Lie down or walk as much as possible.