The Journal of Pediatrics has reported from a study that mothers can regularily exercise without hindering their babies's growth.
They also addressed the issue of breast feeding women having a change in their milk if they exercised. There has been some controversity by conflicting reports about whether excessive exercise would decrease immune-boosting protiens or make the breast milk impalatable if the lactic acids would get too high.
The study looked at several clinical trials that measured growth among breastfed babies with mothers who execised and show no sign of their babies' wetigh gain slowing. In fact, there was statistically no difference in breastfed babies who mothers' exercised when compared to breast fed babies whose mothers did not exercise.
Still, one should be sensible about their exercising after childbirth. Be sure to get a good bond with your child and have a really strong breastfeeding routine. You will also be more tired and worn out, and with the possibility of engourged breasts, you many not want to do anything too vigourous. Walking for 15 minutes a day may be a good way to start out.
Health experts reccomend that babies should be breastfed exclusively for their first six months and then slowly introducing solids to the baby's diet. They also recommend to try to breastfeed for the first year.