My bro wants to know why his stomach just hangs out when he relaxes it sometimes. He is a skinny kid and is fairly well built (17 yrs old 6’ 185, @ ~12% bodyfat) He does not have very much fat on his stomach and this happens even when he doesn’t eat very much.
However, he says that this only happens sometimes, other times it is normally skinny when relaxed.
I have some theories on this, such as differing resting tension of the abs/stomach muscles or gas or backed up fecal matter, but does anyone know for sure what this is and why it changes?
Thanks for dealing with this sort of silly question, because I am pretty sure it has a factual medical answer.