I struggled to lose weight after my first pregnancy despite living a very active lifestyle and exclusively breastfeeding. Some people's bodies hold onto the fat while breastfeeding because their body wants to make sure they have enough fat reserves to make milk. My sisters had the same experience while nursing, and as soon as their babies stopped nursing that was when the weight fell off them. I was 4 months pregnant with my second when my first stopped breastfeeding so I never got that break to allow my body to shed the weight. I am losing the weight more quickly after my second pregnancy, but I don't think it has as much to do with breastfeeding as much as I just don't have as much time to eat now that I have two little ones to look after!