It is Bob's notion that John will not maintain his weight because he is too focused on winning. I don't know where he gets that, from past contestants, maybe? I don't think it is necessarily true but I do think a lot of them gain it back. He has been in the business all of his life so he must sense something.
They lose it too fast and have no guidance, that I have seen, how to translate the food and exercise they have at the ranch to a more healthy and doable routine. And I mean food too. They still do the low fat and encourage subway sandwiches! ACK. The latter is the most shocking to me. Subway rolls are nothing more than ya ya white bread in different shades of beige with specks.
Maybe from his experience with Erik? Or the Season 1 winner Ryan?