I used to be much more fitness aware than I am now, but surprisingly, since I stopped playing rugby, I haven't really put on much weight at all, maybe even lost some.
I do try and eat healthy things though, so I guess that could be part of it, and I'm trying to go to the gym a lot more than I do at the moment, but I don't exactly have much motivation at the moment. It's more about regular swimming at the moment, since I feel more comfortable swimming than sweating around strange people.