I don't have any idea for an exercise but I accepted the fact that when I was breastfeeding my baby, I was meant to be bigger than usual. It is just ain't easy to breastfeed with your stomach being hungry. I really felt the need to eat a lot when I breastfed my baby and was contented with it. However, when the baby got older and he/she keeps on exploring his/her environment, there are lots of exercises for the mothers by running after them at all times.