I wonder this myself. The amount of food I eat keeps my belly distended all day, and it is still there in the mornings, but not as bad. (Very little soduim in my diet, at least compared to the average) But once I'm on contest diet, (Same food just lower cals.) after a few weeks it's not distended anymore.
I worry about the amount of time I spend in the offspring having a lasting effect if I go to long. I'm not fat at all, in fact, I get asked if i'm getting ready for a show, pretty often.
I have found doing ab work every other day has made life easier as I grow, less back pumps from walking, and I feel more steady. But once again, this worries me when it comes to distension. Not that i'm going to stop, but it something i think about.